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  • 301.
    Landgren, Henrik
    et al.
    Linköpings universitet, Institutionen för produktionsekonomi.
    Tjernström, Ulf
    Linköpings universitet, Institutionen för produktionsekonomi.
    Förbättrat informationsflöde för ökad synkronisering och kostnadseffektivitet i försörjningskedjan – en fallstudie2007Självständigt arbete på grundnivå (yrkesexamen), 20 poäng / 30 hpStudentuppsats
    Abstract [sv]

    Slut i hyllan-problematiken är en fråga som aktualiserats i dagligvaruhandeln i allt högre grad det senaste året. I takt med att konkurrensen ökar och marginalerna minskar måste lagernivåer pressas. Det här sker så småningom på bekostnad av servicegraden. Problemet har visat sig särskilt stort i samband med kampanjer. Syftet med detta examensarbete är att kartlägga informationsflödet i försörjnings-planeringen mellan en leverantör och en grossist i dagligvarubranschen samt att se hur detta flöde kan förbättras för att hög servicegrad ska kunna uppnås utan alltför höga lager. Arbetet är utfört som en fallstudie på Findus och Ica med Findus laxfilé naturell som modellprodukt.

    Kartläggningen av informationsflödet i planeringsprocessen har visat på ett komplext flöde där många personer och funktionella enheter från båda företag är inblandade. Undersökningen har också identifierat ett antal svagheter som gör att servicegrad och kostnadseffektivitet försämras.

    De problem vi ser grundar sig främst i de ingående aktörernas bristande medvetenhet om försörjningskedjans förutsättningar och begränsningar. Detta leder till att förståelse för vilken information som är viktig att förmedla saknas. Vidare saknar processen en tydlig struktur där flera prognoser görs oberoende av varandra med olika underlag och med olika syften. Resultatet blir en hög osäkerhet vilken måste hanteras med säkerhetslager. Undersökningen har visat att kostnadsfokus är svagt i förhållande till servicegrad vilket riskerar försörjningskedjans kostnad-seffektivitet

    Vi tror att en ökad integration i en enkel och tydligt strukturerad planeringsprocess skulle kunna förbättra servicegraden och kostnadseffektiviteten. En ökad medvetenhet om försörjningskedjans förutsättningar och kostsamma flexibilitet skulle göra fördelarna med informationsdelning tydligare. Att använda balanserade styrmått som belyser försörjningskedjans synkronisering såväl som kostnads-effektivitet minskar risken för att problem döljs med höga lager.

    Våra slutsatser visar att det finns en klar förbättringspotential i informationsflödet; förändringar skulle bidra till en högre servicegrad till en lägre kostnad.

    Ladda ner fulltext (pdf)
    FULLTEXT01
  • 302.
    Landstedt, John
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Logistik.
    Karlsson, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Logistik.
    Transportation through the Scandria Corridor: A sustainable transport concept between the Adriatic Sea and Scandinavia2010Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    The Scandria Corridor is the shortest way between the Adriatic Sea and the Baltic Sea and stretches from the harbors in the Adriatic Sea to Scandinavia, with branches to Stockholm and Oslo. By offering the shortest route it should be an area in focus for transporting goods. But a large share of European freight traffic goes through the western parts and most main development routes are in east-west connections. Indications have however been made that higher amounts of goods will enter the European market through the harbors in the Mediterranean Sea. As Western Europe is already crowded and congestion is a problem the Scandria Corridor offers new routes with free capacity and shorter south-north connections.

    An immediate problem of European freight traffic is the large use of trucks as means of transportation. As trucks causing large negative environment affects such as high emission levels, congestion on roads and deterioration of the infrastructure the European Union promotes use of other transport concepts. But the alternatives, railway and inland waterway transports, faces different kinds of barriers making them less competitive which obstructs their implementation.

    The information above leads to the thesis purpose “to suggest a sustainable and innovative concept for transporting goods applicable in the Scandria Corridor.” To be sustainable the concept should be future considerate (consider changes in transport conditions), feasible (achieve competitive customer service at reasonable costs) and environmentally friendly (less negative environmental affects than the alternatives). Innovative translates as being open-minded when it comes to combining and implementing ideas, concepts and methods.

    Through a mapping of the infrastructure in the corridor, conditions for the transport methods and customer values the conclusion can be drawn that railway transportation is the best option for transportation in the Scandria Corridor. There are however some barriers that obstruct the set-up of the concept and what route that should be used. A large barrier is the complexity of cross-border transport in Europe because of several different railway electrification systems. Another large barrier is different train control systems that calls for large investments in trains compatible with all systems crossed and staff educated in each system. Another barrier is the low standard of railway tracks in Eastern Europe.

    A mapping of customer values informs that the price is the most important aspect followed by the delivery dependability, given that the lead time is similar to the alternatives. Flexibility is important to some but for most the aspects above are more important. Low environmental affects is important to all parties but no one wants to pay to achieve it. Through analysis of the mapping with support of the theories train needs to offer a lower price than truck alternatives offer to be competitive due to trucks flexibility and ability to reach all destinations. Furthermore train has better possibilities in profitable the longer the distance is.

    Goods flows are studied for the northern Adriatic ports which give that Trieste, Venice and Koper handles the largest volumes. But the amounts of goods between the ports and northern parts of the corridor are probably too low to use one port as the south end point of the concept. Instead a strategic location like Villach (Austria) or Verona (Italy) is better suited as they can work as funnels for larger areas. The solution with a funnel seems to be the best solution for Scandinavia where Trelleborg can be the north end point as a rail ferry from Rostock, suitable for the transport from Germany to Sweden, enters the port of Trelleborg. From Trelleborg goods can be spread to other parts of Scandinavia mainly through branches to Oslo and Stockholm.

    To be sustainable a train concept needs a high fill rate in both directions. To get a high fill rate loading points can be used between the end points. Through a mapping of goods flow between Sweden and regions in the corridor suitable loading points tend to be Berlin (Germany), Munich (Germany) and Vienna (Austria). It is the demand of transport that decides how many loading points that should be used but the fewer the better since they increases the costs and lead time.

    The suggested concept is a train line with green trucks as back-up to irregular demands and problems on railway tracks. Three different concept routes are presented in the thesis.

    The concepts could be arranged in order of implementation. Concept 1 probably has the best chance of getting a high fill rate but the competition is hard on the route. If concept 2 is ready for implementation depends on the demand of transport on this route. When the goods flows are large enough it would probably be a better option because of the few electrification systems and train control systems crossed. Concept 3 is more of a concept for the future, due to many barriers. By using this route bottlenecks and congestion can be avoided.

    Ladda ner fulltext (pdf)
    Transportation through the Scandria Corridor
  • 303.
    Langstrand, Jostein
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Logistik- och kvalitetsutveckling. Linköpings universitet, Tekniska fakulteten.
    An introduction to value stream mapping and analysis2016Övrigt (Övrigt vetenskapligt)
    Abstract [en]

    Value stream mapping (VSM) is a method for illustrating and analyzing the logic of a production process. The terminology stems  from the metaphor of the production process as a steady stream of products where value is added for each step that the products take down stream. This metaphor and the  terminology also strengthen the notion of continuous flow as the ultimate form of production–at least in terms of efficiency...

    Ladda ner fulltext (pdf)
    An introduction to VSM
  • 304. Beställ onlineKöp publikationen >>
    Langstrand, Jostein
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Kvalitetsteknik. Linköpings universitet, HELIX Vinn Excellence Centre. Linköpings universitet, Tekniska högskolan.
    Exploring organizational translation: A case study of changes toward Lean Production2012Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [sv]

    Lean Production är ett koncept som har fått mycket uppmärksamhet under de senaste åren, och många organisationer försöker att införa det utifrån en ambition att uppnå de radikala förbättringseffekterna som utlovas i den populära managementlitteraturen. Att föra in ett managementkoncept kan vara en mycket svår uppgift, och forskning har visat att majoriteten av sådana initiativ misslyckas. En vanlig observation är att utfallet av ett förändringsinitiativ ofta avviker från de ursprungliga målsättningarna, vilket antyder att förändringens innehåll på något sätt har omvandlats under processen. Denna sorts omvandling kan beskrivas som organisatorisk översättning.

    Syftet med avhandlingen är att ge en bild av hur organisatorisk översättning kan gå till samt analysera och identifiera de viktigaste drivkrafterna i sådana processer.

    Avhandlingen baseras på en longitudinell fallstudie som har fokuserat på införandet av managementkonceptet Lean i ett stort svenskt tillverkningsföretag. Studien har genomförts i två faser. I den första fasen har en serie retrospektiva intervjuer genomförts med anställda på samtliga hierarkiska nivåer inom företaget. Studiens andra fas har baserats på en prospektiv ansats. Denna fas har innefattat en kombination av intervjuer, observationer och dokumentstudier, med fokus på ett pilotprojekt inom företaget. Studien har genomförts mellan 2007 och 2011, och behandlar händelser mellan 2003 och 2011.

    Tre former för organisatorisk översättning presenteras i avhandlingen. Dessa definieras som de aktiviteter och processer varigenom Lean översätts till en lokal uppsättning av idéer, praktiker samt objekt. Det föreslås att dessa tre enheter och deras motsvarande former för översättning interagerar och tillsammans påverkar människors beteende, vilket i sin tur påverkar resultaten av förändringsinsatsen. Detta innebär att alla tre former för organisatorisk översättning måste tas i beaktning för att en förändringsinsats ska lyckas. De föreslagna förändringarna måste översättas så att de representeras i fysiska objekt, människors förståelse samt organisatorisk praktik. Brist på överensstämmelse mellan dessa tre enheter kommer leda till spänningar, vilka sannolikt kommer att hindra förändringen och öka risken för misslyckande.

    Delarbeten
    1. Defining lean production: some conceptual and practical issues
    Öppna denna publikation i ny flik eller fönster >>Defining lean production: some conceptual and practical issues
    2009 (Engelska)Ingår i: The TQM Journal, ISSN 1754-2731, E-ISSN 1754-274X, Vol. 21, nr 2, s. 127-142Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    Purpose – The purpose of this paper is to investigate the definition of lean production and the methods and goals associated with the concept as well as how it differs from other popular management concepts. '

    Design/methodology/approach – The paper is based on a review of the contemporary literature on lean production, both journal articles and books.

    Findings – It is shown in the paper that there is no consensus on a definition of lean production between the examined authors. The authors also seem to have different opinions on which characteristics should be associated with the concept. Overall it can be concluded that lean production is not clearly defined in the reviewed literature. This divergence can cause some confusion on a theoretical level, but is probably more problematic on a practical level when organizations aim to implement the concept. This paper argues that it is important for an organization to acknowledge the different variations, and to raise the awareness of the input in the implementation process. It is further argued that the organization should not accept any random variant of lean, but make active choices and adapt the concept to suit the organization's needs. Through this process of adaptation, the organization will be able to increase the odds of performing a predictable and successful implementation.

    Originality/value – This paper provides a critical perspective on the discourse surrounding lean production, and gives an input to the discussion of the implementation of management models.

    Ort, förlag, år, upplaga, sidor
    Bingley, UK: Emerald Group Publishing Limited, 2009
    Nyckelord
    Lean Production, Quality Management, Definition
    Nationell ämneskategori
    Företagsekonomi
    Identifikatorer
    urn:nbn:se:liu:diva-18419 (URN)10.1108/17542730910938137 (DOI)
    Tillgänglig från: 2009-05-26 Skapad: 2009-05-26 Senast uppdaterad: 2017-12-13Bibliografiskt granskad
    2. Quality Improvement activities in Swedish industry: drivers, approaches and outcomes
    Öppna denna publikation i ny flik eller fönster >>Quality Improvement activities in Swedish industry: drivers, approaches and outcomes
    Visa övriga...
    2010 (Engelska)Ingår i: International Journal of Quality and Service Sciences, ISSN 1756-669X, E-ISSN 1756-6703, Vol. 2, nr 2, s. 206-216Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    Purpose – This paper aims to present and discuss the current state of quality-improvement activities in Swedish companies. The paper focuses on the drivers for quality improvement; types of approaches, tools and techniques, and organizational aspects influenced by quality improvement; and potential areas for improvement.

    Design/methodology/approach – This paper presents results from a survey on quality improvement work in Swedish industry. Data for this paper were collected using a web-based questionnaire that was distributed to 800 production managers working in Swedish service and manufacturing organizations. Of the 800 questionnaires sent, a total of 118 questionnaires were filled out, which resulted in a response rate of 16 percent.

    Findings – The result shows that the major drivers for quality improvement work in Swedish industry are economical aspects as the need for cost reduction, the need to become more competitive and the wish to increase market share. Drivers such as pressure from shareholders and trends in management have a minor role. The underlying approaches for quality improvement work are standards such as ISO 9000 and ISO 14000. A total of 72 percent of respondents stated that they work with quality management systems; 59 percent, with environmental management systems. The aspects that were most positively influenced by the improvement work were employee motivation, customer satisfaction, employee satisfaction, product/service quality, and flow in internal processes.

    Research limitations/implications – Empirical results obtained in Sweden may differ to some extent in other countries.

    Practical implications – This paper is intended as a source of inspiration for researchers, consultants, and managers who are interested in the current trends and future developments in the quality field.

    Originality/value – The paper provides valuable insights into the current state of quality improvement activities in Swedish industry, as seen from the perspective of the production manager.

    Ort, förlag, år, upplaga, sidor
    Emerald, 2010
    Nyckelord
    Quality improvement, Quality standards, Total quality management
    Nationell ämneskategori
    Produktionsteknik, arbetsvetenskap och ergonomi
    Identifikatorer
    urn:nbn:se:liu:diva-62694 (URN)10.1108/17566691011057366 (DOI)
    Tillgänglig från: 2010-12-02 Skapad: 2010-12-02 Senast uppdaterad: 2022-03-04Bibliografiskt granskad
    3. Non-human resistance in changes towards lean
    Öppna denna publikation i ny flik eller fönster >>Non-human resistance in changes towards lean
    2012 (Engelska)Ingår i: Journal of Organizational Change Management, ISSN 0953-4814, E-ISSN 1758-7816, Vol. 25, nr 6, s. 853-866Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    Purpose: The importance of social issues is well established in the literature on resistance to change. However, much can be gained by including physical objects in the analysis. Using actor-network theory, this paper aims to explore the resistance of non-human actors in organizational change and contribute to an expanded understanding of resistance to change. Design/methodology/approach: The article is based on a longitudinal case study of the introduction of lean in a large Swedish manufacturing company. The empirical basis consists of interviews, observations and document studies. Actor-network theory is used as a theoretical lens to identify non-human resistance to change. Findings: The paper proposes that non-human actors can inhibit change through a lack of alignment with the overall change initiative. This may cause large variation in the interpretation of the proposed change and a lengthy process of construction and negotiation. The paper provides examples of four different types of non-human resistance that result from this lack of alignment. Practical implications: It is proposed that change initiatives need to be aligned with existing practice and anchored in objects that are integrated in organizational routines. The four types of non-human resistance presented in the paper may be used as a checklist to reduce the risk of failure. Originality/value: The predominant focus on social issues tends to disregard the impact of the physical environment in change processes. Actor-network theory and the inclusion of the physical environment will help to expand and improve the understanding of resistance to change.

    Ort, förlag, år, upplaga, sidor
    Emerald Group Publishing Limited, 2012
    Nyckelord
    Actor-network theory; Change; Change management; Lean production; Manufacturing industries; Resistance; Sociotechnical change; Sweden
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-75353 (URN)10.1108/09534811211280609 (DOI)
    Anmärkning

    On the day of the defence day the status of this article was: Manuscript

    Tillgänglig från: 2012-02-27 Skapad: 2012-02-27 Senast uppdaterad: 2017-12-07Bibliografiskt granskad
    4. Balanced Scorecard as Organizational Practice: A multi-perspective analysis
    Öppna denna publikation i ny flik eller fönster >>Balanced Scorecard as Organizational Practice: A multi-perspective analysis
    2010 (Engelska)Övrigt (Övrigt vetenskapligt)
    Abstract [en]

    Much academic attention has been directed towards management models, but there is limited research into the details of how these models are put to use in organizations. In this paper, we employ a multi-theoretical process perspective on the introduction of Balanced Scorecard in a Swedish healthcare organization. Through the application of actor-network theory, behavior setting theory and distributed cognition, we have identified a set of complementary observations and conclusions. First, we claim that a critical mass of actors is needed to support the change effort. We also emphasize the need for a problematization process in which critical voices are given room to influence the introduction. Further, we stress the importance of aligning the physical environment with organizational goals, and argue that well-designed feedback mechanisms may prevent undesired decoupling of managerial practice.

    Ort, förlag, år, sidor
    Linköping: Linköping University Electronic Press, 2010
    Nyckelord
    Management models, change, process studies, multiple interpretations
    Nationell ämneskategori
    Produktionsteknik, arbetsvetenskap och ergonomi
    Identifikatorer
    urn:nbn:se:liu:diva-75049 (URN)
    Anmärkning
    Working paper.Tillgänglig från: 2012-02-16 Skapad: 2012-02-15 Senast uppdaterad: 2015-02-05Bibliografiskt granskad
    Ladda ner fulltext (pdf)
    Exploring organizational translation: A case study of changes toward Lean Production
    Ladda ner (pdf)
    omslag
  • 305.
    Langstrand, Jostein
    et al.
    Linköpings universitet, HELIX Vinn Excellence Centre. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Kvalitetsteknik. Linköpings universitet, Tekniska högskolan.
    Cronemyr, Peter
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Kvalitetsteknik. Linköpings universitet, Tekniska högskolan.
    Poksinska, Bozena
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Kvalitetsteknik. Linköpings universitet, Tekniska högskolan.
    Practise what you preach: Quality of education in education on quality2012Ingår i: : How may organizations use Learning, Creativity and Innovation in realizing their dreams of excellence and recover from the economic crisis? / [ed] Su Mi Dahlgaard-Park, Jens J. Dahlgaard & Adam Hamrol, 2012, s. 855-867Konferensbidrag (Övrigt vetenskapligt)
  • 306.
    Lantz Cronqvist, Mattias
    et al.
    Linköpings universitet, Institutionen för datavetenskap, Interaktiva och kognitiva system. Linköpings universitet, Tekniska fakulteten.
    Jonson, Carl-Oscar
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för Kirurgi, Ortopedi och Onkologi. Linköpings universitet, Medicinska fakulteten. Region Östergötland, Regionledningskontoret, Katastrofmedicinskt centrum.
    Prytz, Erik
    Linköpings universitet, Institutionen för datavetenskap, Interaktiva och kognitiva system. Linköpings universitet, Filosofiska fakulteten. Linköpings universitet, Institutionen för klinisk och experimentell medicin. Linköpings universitet, Medicinska fakulteten. Region Östergötland, Regionledningskontoret, Katastrofmedicinskt centrum.
    Development and Initial Validation of a Stochastic Discrete Event Simulation to Assess Disaster Preparedness2019Ingår i: Prehospital and Disaster Medicine, ISSN 1049-023X, E-ISSN 1945-1938, Vol. 34, nr 1, s. 118-118Artikel i tidskrift (Övrigt vetenskapligt)
    Abstract [en]

    Introduction:

    Assessing disaster preparedness in a given region is a complex problem. Current methods are often resource-intensive and may lack generalizability beyond a specific scenario. Computer-based stochastic simulations may be an additional method but would require systems that are valid, flexible, and easy to use. Emergo Train System (ETS) is an analog simulation system used for disaster preparedness assessments.

    Aim:

    To digitalize the ETS model and develop stochastic simulation software for improved disaster preparedness assessments.

    Methods:

    A simulation software was developed in C#. The simulation model was based on ETS. Preliminary verification and validation (V&V) tests were performed, including unit and integration testing, trace validation, and a comparison to a prior analog ETS disaster preparedness assessment exercise.

    Results:

    The software contains medically validated patients from ETS and is capable of automatically running disaster scenarios with stochastic variations in the injury panorama, available resources, geographical location, and other variables. It consists of two main programs: an editor where scenarios can be constructed and a simulation system to evaluate the outcome. Initial V&V testing showed that the software is reliable and internally consistent. The comparison to the analog exercise showed a general high agreement in terms of patient outcome. The analog exercise featured a train derailment with 397 injured, of which 45 patients suffered preventable death. In comparison, the computer simulation ran 100 iterations of the same scenario and indicated that a median of 41 patients (IQR 31 to 44) would suffer a preventable death.

    Discussion:

    Stochastic simulation methods can be a powerful complement to traditional capability assessments methods. The developed simulation software can be used for both assessing emergency preparedness with some validity and as a complement to analog capability assessment exercises, both as input and to validate results. Future work includes comparing the simulation to real disaster outcomes.

  • 307.
    Larsson, Andréas
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling.
    Lönnberg, Patrik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling.
    Utveckling av metod för mätning av Overall Equipment Effectiveness vid Siemens Industrial Turbomachinery AB2007Självständigt arbete på avancerad nivå (magisterexamen), 20 poäng / 30 hpStudentuppsats
    Abstract [sv]

    Siemens Industrial Turbomachinery AB (SIT AB) i Finspång är ett företag vars verksamhet är inriktad på tillverkning av gas- och ångturbiner för främst industriella tillämpningsområden. Företaget har cirka 2 100 anställda och är en del av den tyska storkoncernen Siemens AG. Inom SIT AB har det sedan tidigare funnits en delad mening kring vilka orsaker som främst bidrar till förluster inom företagets produktion. I dagsläget genomförs flera olika typer av driftsuppföljningar, ett problem är dock att dessa inte är synkroniserade för att ge en tydlig förlustbild på maskinspecifik nivå. Till följd av detta önskar nu produktionsansvariga på SIT AB undersöka möjligheten att mäta utrustningseffektiviteten hos sina maskinresurser genom införande av mätetalet Overall Equipment Effectiveness (OEE). Genom ett pilotprojekt ska en metod för mätning av OEE på SIT AB utvecklas, denna ska sedan implementeras och testas på två av företagets fleroperationsmaskiner. Pilotprojektet genomförs i form av ett examensarbete, arbetet ska ligga till grund för rekommendationer gällande hur mätresultaten ska användas samt hur SIT AB ska gå tillväga för att kunna genomföra OEE-mätningar i större skala.

    OEE avser mätning av total utrustningseffektivitet genom ett enda mätetal. Syftet med beräkningen är att åskådliggöra omfattningen av de sex stora produktionsförluster som definieras inom ramen för Total Productive Maintenance. Efter förlustanalys kan välriktade förbättringsåtgärder vidtas med avsikt att öka utrustningseffektiviteten hos den studerade resursen.

    Inom denna undersökning konstateras att OEE är ett mätetal som främst är framtaget för applikation i processliknande industrier. Eftersom SIT AB bedriver tillverkning i en huvudsakligen funktionell verkstadsmiljö krävs viss anpassning för att öka mätetalets tillämpbarhet på företaget. En sådan anpassning får även stöd i litteraturen där det klargörs att det är viktigare att åstadkomma en mätning som kan ligga till grund för förbättringsarbete än att strikt följa grunddefinitionen av OEE. Som stöd för metodanpassningen genomfördes en fallstudie på Kongsberg Terotech AS (KTT), ett av nordens ledande företag inom branschen för underhåll av verktygsmaskiner. KTT har stor erfarenhet inom OEE-mätning genom arbete som rådgivare på uppskattningsvis 15-20 olika företag där verksamhetsområdena sträcker sig från enstyckstillverkning till processindustri och från skärande bearbetning till livsmedelindustri.

    Den metod som utvecklats för mätning av OEE på SIT AB är helt baserad på storheten tid. Mätningen sker genom tidsregistrering inom ett diskret antal fördefinierade förlustkategorier, framtagna specifikt för de studerade maskinerna. Genom utvecklandet av en specialdesignad blankett kan datainsamlingen skötas av maskinernas operatörer under pågående ordinarie arbete. Mätningarnas manuella utförande utgör ett hinder för exakt stopptidsmätning, konceptet kan dock införas med kort varsel och utan krav på dyra investeringar i avancerad mätutrustning.

    På inrådan från KTT genomfördes OEE-mätning under en period om fyra veckor i respektive maskin. Förlustdata kunde insamlas från 95 av 96 möjliga skift och dataunderlaget omfattar 564 respektive 576 planerade produktionstimmar i vardera resurs. Trots att de båda fleroperationsmaskinerna i princip är identiska till utförandet uppvisades förlustbilder som i jämförelse är relativt olika. Av detta dras slutsatsen att maskinerna bör behandlas individuellt vid vidtagandet av eventuella förbättringsåtgärder.

    OEE-mätning är något som enbart ska utföras i syfte att underlätta och motivera kontinuerligt förbättringsarbete kopplat till företagets tillverkningsprocesser. Den framtagna mätmetoden kan hjälpa SIT AB att värdera förbättringspotentialen hos den studerade produktionsutrustningen, insamlad data kan även användas för att prioritera hur förbättringsinsatserna ska fokuseras. Huvuddragen i metoden kan även användas för mätning i stor skala, förlustkategorier bör dock väljas utgående från den maskin där mätningarna ska introduceras. En tydlig nackdel är att metoden i nuvarande utförande inte säkerställer god kvalitet i insamlad data, detta kan innebära viss risk för att beslut fattas på felaktiga grunder. Metoden kan vara lämplig att använda som introduktion till OEE-mätning eller i det fall att företaget vill undvika mer omfattande investeringar kopplat till mätningarna. Om SIT AB i framtiden vill satsa på OEE-mätning rekommenderas att datainsamlingen automatiseras.

    Det förbättringsarbete som ska följa av genomförda OEE-mätningar bör skötas av förbättringsgrupper tillsatta för ändamålet. Förbättringsgrupperna innehåller med fördel personal med olika kunskapsområden. En tvärfunktionell sammansättning bör innebära att förbättringsarbetet kan skötas på ett mer mångsidigt sätt än vid behandling av enskilda personalgrupper. Den viktigaste förutsättningen för ett lyckat förbättringsarbete är att alla beslut kan baseras på fakta från verkligheten, mätningar som exempelvis OEE utgör konkreta verktyg för att åstadkomma denna situation. För att kunna styra och förbättra centrala produktionsprocesser måste dessa ständigt utvärderas. I detta sammanhang kan införandet av OEE-mätning komma att spela en central roll för verksamheten på SIT AB.

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    FULLTEXT01
  • 308. Beställ onlineKöp publikationen >>
    Larsson, Ann-Christine
    Linköpings universitet, Institutionen för beteendevetenskap och lärande. Linköpings universitet, Filosofiska fakulteten.
    Empowermentprocesser – ett sätt att öka långtidssjukskrivna kvinnors resurser?: En studie om att återta balansen i arbetslivet att återta balansen i arbetslivet2007Doktorsavhandling, monografi (Övrigt vetenskapligt)
    Abstract [sv]

    Syftet med avhandlingen är att förstå och förklara hur en grupp kvinnors långtidssjukskrivning har uppstått och hur en återgång till arbetslivet kan gå till. Stödet för återgången organiseras inom ramen för ett utvecklingsprojekt i EU-programmet EQUAL, där empowerment är en av nyckelprinciperna.

    Forskningen har skett utifrån en interaktiv ansats i nära samverkan med de långtidssjukskrivna kvinnorna i projektet. Gruppsamtal, enkäter och enskilda intervjuer har legat till grund för den gemensamma analysen. Denna lärprocess, som är kärnan i den interaktiva forskningen, har bland annat resulterat i en fördjupad och mer valid kunskap om bland annat förklaringar till ohälsa och återgång till arbetslivet.

    Den empiriska delen av studien och analysen är indelad i tre delar. Den första delen kallar jag vanmaktsprocessen, det vill säga det som kvinnorna beskriver som bidragande orsaker till ohälsa orsakade av ökande krav och minskande resurser i både arbetsliv och privatliv och som till slut leder in i en sjukskrivning. Den andra delen handlar om att återskapa och/eller förändra de resurser som gått förlorade. Den tredje delen beskriver återgången till arbetslivet, vilken beskrivs i olika steg.

    Avhandlingen visar på värdet av att se samspelet mellan individ-, organisations- och samhällsnivån när det gäller förklaringar till ohälsa och hur förändringar på de olika nivåerna påverkar individen. Avhandlingen visar även på vikten att se till ”hela livet” inte bara arbetslivet, när det gäller en återgång till arbetslivet. För att uppnå ett hållbart arbetsliv bör hänsyn tas till ”hela livet”. Work-life balance begreppet – vilket innefattar arbete, familj och fritidsaspekterna – har visat sig vara ett fruktbart begrepp i analysen.

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    FULLTEXT01
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    COVER01
  • 309.
    Larsson, Staffan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Malmstens Linköpings universitet.
    Spiralformer, då och i nutid2021Självständigt arbete på grundnivå (kandidatexamen), 10,5 poäng / 16 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    I denna studie tar jag avstamp i några möbler i nybarockstil från första halvan av 1900-talet. Jag undersöker olika tillverkningsmetoder för spiraler och kolonnskaft med vriden kannelering. Börjar med metoder från 1700 talet, tar dem vidare och anpassa dem till handöverfräs med en mall. Jag gör digitala 3D-modeller av och tillverkar mallarna samttillverkar skaft med vridna kannelyrer. Låter även tillverka en skaft med vridna kannelyrer i en CNC och jämför med tillverkning med handöverfräs. Handöverfräsen visar sig snabbare och ger ett bättre resultat än den CNC teknik som jag har haft möjlighet att jämföra med.

    Ladda ner fulltext (pdf)
    fulltext
  • 310.
    Laurinsson, Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling.
    Produktionsutveckling av cylinderrörs tillverkning2008Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats
    Abstract [sv]

    Detta examensjobb utfördes på Stacke Hydraulik AB som tillverkar och säljer hydrauliska system.

    Uppdraget var att uppdatera deras befintliga verkstadslayout samt att studera om flödet för ”små och medelstora” rör går att förbättra. För att kunna optimera flödet var man tvungen att ta fram vilka/vilken process som var flaskhals, för att sedan kunna ge förslag på förändringar som kan leda till ett bättre flöde och en kortare ledtid.

    Studierna av flaskhals grundades på totalt 50 stycken cylinderrör, de mest tillverkade samt de som har störst volymvärde. Produktionsgrupp 117 (svarv) identifierades som flaskhals eftersom den tog längst tid i processen, men även produktionsgrupp 118 (svarv) är en flaskhals. 26 % av cylinderrören hade produktionsgrupp 117 som flaskhals medan 24 % hade produktionsgrupp 118.

    För att optimera produktionsflödet för dessa rör krävs det att man använder produktionsgrupperna effektivt med minimerat slöseri.

    Ett alternativ till förbättring skulle kunna vara en utökad maskinpark för tillverkning av dessa rör.

    Ladda ner fulltext (pdf)
    FULLTEXT01
  • 311.
    Lee, H. M.
    et al.
    Singapore Institute of Manufacturing Technology, Singapore.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Swedish WEEE system – Challenges and Recommendations2012Ingår i: Sustainable Systems and Technology (ISSST), 2012, IEEE , 2012, s. 1-6Konferensbidrag (Refereegranskat)
    Abstract [en]

    The directive in WEEE has been in effect since 2001 in the European Union (EU) and Sweden has been the best performance since it was launched. This study looks into how the various stakeholders are playing their role in the system, why was it successful and what are the challenges ahead for the system to further improve and the bring up the rate of WEEE recycling in the country. This work is done by interviewing and visiting the various stakeholders involved in the Swedish WEEE system including the Swedish EPA, Swedish Waste Management, El-Kretsen which is the association representing the manufacturers, the recyclers that are providing the EoL services in the system and consumers of the recycling centres. The study revealed that the system had performed well by virtue of the common understanding and general awareness of the public adding on to the fact that the consumption rate of EEE is also high in Sweden. All the stakeholders displayed a sense a responsibility towards pushing for higher volume to be collected. Many issues that are occurring in collecting WEEE are inherited from the earlier life cycle stages particularly in design and manufacturing. It was also found out in the study that it is more economically viable for the EoL stakeholders to operate WEEE collection as compared to the past due to the growing demands of resources. The processing capacity at times is lagging behind the collection rate. Recommendations for improving the system from both the system level and technical level are also mentioned subsequently in the paper.

  • 312.
    Lee, Hui Mien
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Monteringsteknik. Linköpings universitet, Tekniska högskolan.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Monteringsteknik. Linköpings universitet, Tekniska högskolan.
    Nasr, Nabil
    Golisano Institute of Sustainability, Rochester Institute of Technology, Rochester, USA.
    Review of End-of-Life Management Issues in Sustainable Electronic Products2011Ingår i: CIRP 9th Global Conference on Sustainable Manufacturing, 2011, s. 121-131Konferensbidrag (Refereegranskat)
    Abstract [en]

    Concerns about climate change and other related environmental challenges have prompted increased interest in sustainable development. In industry, many manufacturers such as the electronics manufacturers have strived to improve their environmental footprints through sustainable manufacturing while also making sure that the bottom line is being met. Electronic products, while bringing technological progress to mankind, generate numerous environmental challenges, especially at their End-of-Life (EoL) stage.

     

    This paper review and discuss the current situation and issues in designing, manufacturing, collecting and marketing of electronic products with respect to the EoL stage. Certain decisions about electronic products made in the early production stages can have serious implications in the management of the products at EoL. For example, a product designed such that it is difficult to disassemble in order to remove hazardous substances can be very inefficient to manage at the EoL stage. Discussion of electronic products’ EoL management approaches is presented in this paper. Subsequently, suggestions for the stakeholders to address the complexities in making electronic products more sustainable are proposed.

  • 313.
    Leppälampi, Erik
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling.
    Krantz, Andreas
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling.
    Värdekedjeanalys av returflöden på Scania: Fallstudie på marknaderna i Sverige, Tyskland och Benelux2008Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats
    Abstract [sv]

    Scania lägger idag ner stor energi på att ständigt utveckla kvaliteten på de tillverkade fordonen. I avsikt att följa upp de kvalitetsbrister som uppdagas vid reparationer ute på företagets service­verkstäder genomförs materialhemtagningar för att centralt kunna analysera defekterna och utveckla kvaliteten, men också för att ersätta verkstädernas utlägg och kontrollera att de följer garantimanualens föreskrifter.

    Beroende på lokala rutiner och varierande upplägg av respektive marknads distributionsstruktur är de ledtider och kostnader som dessa materialflöden idag medför svåra att uppskatta. Ledtiderna är dessutom i många fall omotiverat långa vilket medför att informationen om kvalitetsbrister ankommer Scania sent. Dessutom medför variationerna i ledtiden att det blir svårt att planera verksamheten.

    Denna studie har utifrån ovanstående bakgrund avsett att kartlägga och analysera de ledtider och kostnader som uppstår i materialflödet av returmaterial, från Scanias serviceverkstäder via distributören till fabriken i Södertälje. Utifrån analysresultaten har alternativa lösningar utarbetats för att på ett kostnadseffektivt sätt reducera ledtiderna.

    Kartläggningen som skedde på marknaderna i Sverige, Tyskland och Benelux har huvudsakligen genomförts via besök hos distributörer och serviceverkstäder på respektive marknad och har sammanställts i ett empiriunderlag. Förutom de mer kvalitativa aspekterna i detta underlag har respektive marknads prestanda, i form av kostnader och ledtider, sammanställts och beräknats. De observerade egenskaperna på de studerade marknaderna kunde tillsammans med relevant teori analyseras för att påvisa styrkor och svagheter med olika upplägg och lösningar.

    Utifrån kartläggning och analys kunde studiens andra del fullbordas, vilken avsåg att ta fram rekommendationer för åtgärder som medförde ett kostnadseffektivare upplägg och samtidigt reducerade ledtider. Rekommendationerna som nedan presenteras har utgått från de prioriteringar som gjordes i analysen, vilka huvudsakligen utgår från Scanias strävan efter hög produktkvalitet och snabb information, vilket indirekt implicerar korta ledtider.

    1. Förbättrad styrning/mätning från fabrik, genom formulering av tydliga målsättningar från fabrik centralt, vilket omfattar definiering av explicita mätpunkter och kommunikation av tydliga krav och incitament gentemot övriga aktörer.
    2. Minska väntetiden mellan aktiviteterna, genom att införa krav och/eller incitament, enligt resonemanget ovan, gentemot serviceverkstäder och distributörer. Detta ökar prioriteten samtidigt som utformandet av bättre rutiner stimuleras.
    3. Förändra flödesvägar och transportstrategier. För Benelux-marknaden bedöms de befintliga transportstrategierna fungera bra då de är både kostnadseffektiva och samtidigt medför korta ledtider. På den svenska marknaden kan efter analys konstateras att dagens lösning är ett fullgott alternativ, men för att undvika de ojämna inleveranserna rekommenderas att en konsolidering av godset genomförs för vidare inleverans en gång per vecka. För den tyska marknaden föreslås samleveranser, så kallade mjölkrundor, i samband med reservdelsleveranserna som levererar godset till ett antal uppsamlingsplatser. Från uppsamlingsplatserna bör godset skickas till distributören som efter besiktning levererar godset vidare till Södertälje.
    4. Förändra transportfrekvenserna, in till fabrik till en gång per vecka för samtliga marknader för att samla ihop hanterbara mängder från marknaden och samtidigt hålla ledtiden nere.
    5. Jämna ut inflödet till Södertälje och undvik hantering i byggnad 220X, för att minska problemen med stress, felhantering och resursbrist som uppstår i och med dagens ojämna flöde vid ankomstmottagningen i byggnad 280. Tydliga besked bör här ges till respektive marknad om exempelvis vilka avskeppningsdatum och vilken information som efterfrågas.
    6. Förbättra systemstödet, för att underlätta informationsspridning och administrativa aktiviteter relaterade till reklamationer och materialhemtagningar, vilket också innebär att endast önskat material tas hem och prognostisering och styrning underlättas.

     

    Genom de föreslagna åtgärderna har ledtiderna för Sverige beräknats minska från 21 till 13 dagar, för Tyskland från 60 till 21 dagar och för Benelux från 39 till 21 dagar. Förutom kortare ledtider innebär tydligare krav och incitament tillsammans med förbättrade rutiner att variationerna i ledtiderna minskar.

    Baserat på de utarbetade rekommendationerna minskar också kostnaderna både genom minskade ledtider, vilket påverkar lagerföringskostnaderna, och genom effektivare upplägg som minskar lagerhållningskostnaderna och transportkostnaderna.

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    Värdekedjeanalys av returflöden på Scania
  • 314.
    Li, Congdong
    et al.
    School of Management, Jinan University, Guangzhou, China; College of Management and Economics, Tianjin University, Tianjin, China.
    Zhang, Fanshun
    School of Management, Jinan University, Guangzhou, China.
    Cao, Cejun
    Institute of Physical Internet, School of Electrical and Information Engineering, Jinan University (Zhuhai Campus), Zhuhai, China; College of Management and Economics, Tianjin University, Tianjin, China.
    Liu, Yang
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska fakulteten. Institute of Physical Internet, School of Electrical and Information Engineering, Jinan University (Zhuhai Campus), Zhuhai, China; Department of Production, University of Vaasa, Vaasa, Finland.
    Qu, Ting
    Institute of Physical Internet, School of Electrical and Information Engineering, Jinan University (Zhuhai Campus), Zhuhai, China.
    Organizational coordination in sustainable humanitarian supply chain: an evolutionary game approach2019Ingår i: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 219, s. 291-303Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Sustainable humanitarian supply chain has a great impact on saving lives, decreasing human suffering and contributing to development. Organizational coordination plays an important role in it, although it is uncommon to be established due to the conflicting interests and expectations. To cope with the problem and achieve the sustainability of humanitarian supply chain, the coordination between private sector and humanitarian organization was further discussed with the help of sustainable principle regarding stakeholder approach. Different from the existing literature that elaborated the drivers and the advantages of coordination, this paper aims to explore the coordination mechanism regarding whether to coordinate, when to adopt the optimal coordinated strategy and how such a strategy can perform well. To analyze the tendency of the coordinated decisions, evolutionary game models concerning traditional and trust mechanisms were developed. Then, computational studies based on hypothetic data were simulated to validate the effectiveness of the proposed model. Results indicated that the coordination decision was affected by coordinated returns and costs, normal returns and extra returns in terms of the traditional mechanism. Several situations in regard to the coordinated decisions were analyzed by adopting evolutionary stable strategies. Moreover, trust had a significantly positive impact on coordination promotion under the support of potential returns and high-level trust. Finally, managerial insights for achieving the sustainable humanitarian supply chain were given from the perspective of organizational coordination and strategy.

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    Organizational coordination in sustainable humanitarian supply chain: an evolutionary game approach
  • 315.
    Li, Lianhui
    et al.
    Ningxia Key Laboratory of Intelligent Information and Big Data Processing, North Minzu University, People's Republic of China.
    Mao, Chunlei
    Nanjing Automation Institute of Water Conservancy and Hydrology, People's Republic of China.
    Lei, Bingbing
    Ningxia Key Laboratory of Intelligent Information and Big Data Processing, North Minzu University, People's Republic of China.
    Gao, Yang
    Ningxia Key Laboratory of Intelligent Information and Big Data Processing, North Minzu University, People's Republic of China.
    Liu, Yang
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska fakulteten.
    Huang, George Q.
    Department of Industrial and Manufacturing Systems Engineering, The University of Hong Kong, People's Republic of China.
    Decision-making of product-service system solution selection based on integrated weight and technique for order preference by similarity to an ideal solution2020Ingår i: IET Collaborative Intelligent Manufacturing, E-ISSN 2516-8398, Vol. 2, nr 3, s. 102-108Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Product-service system (PSS) solution selection is of great significance to better meet the personalised needs of customers and ensure the subsequent implementation. The problems of incomplete index system, difficulty to obtain the value of the qualitative index and unreasonable single index weighting have a significant impact on the decision-making of PSS solution selection. In response to these problems, a decision-making framework of PSS solution selection is constructed. A comprehensive index system is established from the perspectives of multiple stakeholders. Expert evaluating with the fuzzy number and multi-expert evaluation opinion combination is adopted for index value solving. Integration of objective and subjective weights is achieved based on the multi-weight information consistency model and the candidate PSS solutions are ranked by technique for order preference by similarity to an ideal solution finally. An application case of automobile PSS solution selection is given to verify the effectiveness and rationality of the constructed decision-making framework.

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    fulltext
  • 316. Beställ onlineKöp publikationen >>
    Lidén, Tomas
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Kommunikations- och transportsystem. Linköpings universitet, Tekniska fakulteten.
    Towards concurrent planning of railway maintenance and train services2016Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    Efficiency in the public and freight transportation systems is of crucial importance for a society. Railways can offer high capacity and relatively low environmental impact, but require that several technical systems are tuned and operate well. Specifically there is a very tight interdependency between infrastructure and trains, which distinguishes railways from other transportation modes. Thus maintenance of all the subsystems is needed.

    Railways do also have some specific and complicating properties that influence maintenance and operations: Most activities need exclusive access to the infrastructure and - due to the geographic layout, safety requirements and partitioning of the subsystems - large portions of the network will be affected by each activity. Furthermore, several organisational units and resources are involved, ranging from governments and regulatory bodies, over operators and contractors to suppliers, technical experts and work forces. Thus railway maintenance is complicated to organize and consumes large budgets.

    This thesis treats the planning and scheduling problems that concern railway infrastructure maintenance and the coordination with train traffic. Mathematical methods and optimization are studied and used, with the aim of advancing the knowledge about models for solving such problems.

    The thesis contains three papers and presents: (1) A survey regarding railway maintenance activities, the major planning problems and the conducted research so far; (2) A model for quantitative comparison and assessment of competing capacity requests from train operations and maintenance; (3) An optimization model for integrated scheduling of both maintenance windows and train services.

    The work can be helpful for practitioners as well as researchers who want to take further steps in this interesting and challenging area. Based on the results that have been obtained, future research directions are presented that may lead towards practical use of concurrent planning of railway maintenance and train services.

    Delarbeten
    1. Railway infrastructure maintenance - a survey of planning problems and conducted research
    Öppna denna publikation i ny flik eller fönster >>Railway infrastructure maintenance - a survey of planning problems and conducted research
    2015 (Engelska)Ingår i: Transportation Research Procedia / [ed] Bruno F. Santos, Gonçalo H.A. Correia and Maarten Kroesen, Elsevier, 2015, Vol. 10, s. 574-583Konferensbidrag, Publicerat paper (Övrigt vetenskapligt)
    Abstract [en]

    Railway infrastructure maintenance consumes very large budgets, is complicated to organize and has numerous challenging planning problems. Specifically, the coordination with train traffic operation is of crucial importance. Despite this, little work has been conducted in the operations research area regarding infrastructure maintenance as compared to train traffic operations.

    The aim of this paper is to give a comprehensive overview of the railway infrastructure maintenance field, the planning problems it contains and the research that has been conducted so far. We present (i) a catalogue of planning problems, based on a series of interviews with experts and planners representing all major stake holders in Sweden and (ii) an extensive literature overview covering more than 60 research references published until 2014 regarding the use of mathematical methods and optimization for solving such planning problems. From this we extract some statistics and a mapping which identify the major lines of work as well as future research possibilities.

    Ort, förlag, år, upplaga, sidor
    Elsevier, 2015
    Serie
    Transportation Research Procedia, ISSN 2352-1465 ; 10
    Nyckelord
    Maintenance planning, Operations research, Railway infrastructure
    Nationell ämneskategori
    Transportteknik och logistik
    Identifikatorer
    urn:nbn:se:liu:diva-121597 (URN)10.1016/j.trpro.2015.09.011 (DOI)000380503900059 ()
    Konferens
    18th Euro Working Group on Transportation, EWGT 2015, Delft, The Netherlands, 14-16 July 2015
    Projekt
    Efficient planning of railway infrastructure maintenance
    Tillgänglig från: 2015-09-28 Skapad: 2015-09-28 Senast uppdaterad: 2016-09-05Bibliografiskt granskad
    2. Dimensioning windows for railway infrastructure maintenance: Cost efficiency versus traffic impact
    Öppna denna publikation i ny flik eller fönster >>Dimensioning windows for railway infrastructure maintenance: Cost efficiency versus traffic impact
    2016 (Engelska)Ingår i: Journal of Rail Transport Planning & Management, ISSN 2210-9706, E-ISSN 2210-9714, Vol. 6, nr 1, s. 32-47Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    The Swedish Transport Administration is introducing a new regime, called maintenance windows, for allocating train free slots reserved for maintenance tasks on the railway infrastructure. In this paper, a model for the assessment and the dimensioning of such maintenance windows is presented, which considers marginal effects on both the maintenance cost and the expected train traffic demand. The aim is to establish quantitative measures that can be used for comparing conflicting capacity requests from infrastructure maintenance and traffic operations on railway networks. The model is demonstrated in a cost benefit analysis for a real life case study on the Swedish Northern Main Line.

    Ort, förlag, år, upplaga, sidor
    Elsevier, 2016
    Nyckelord
    Maintenance planning; Cost benefit analysis; Railway infrastructure
    Nationell ämneskategori
    Transportteknik och logistik
    Identifikatorer
    urn:nbn:se:liu:diva-126777 (URN)10.1016/j.jrtpm.2016.03.002 (DOI)
    Projekt
    Efficient planning of railway infrastructure maintenance
    Forskningsfinansiär
    Trafikverket, TRV 2013/55886
    Tillgänglig från: 2016-04-05 Skapad: 2016-04-05 Senast uppdaterad: 2018-11-05Bibliografiskt granskad
    3. An optimization model for integrated planning of railway traffic and network maintenance
    Öppna denna publikation i ny flik eller fönster >>An optimization model for integrated planning of railway traffic and network maintenance
    2017 (Engelska)Ingår i: Transportation Research Part C: Emerging Technologies, ISSN 0968-090X, E-ISSN 1879-2359, Vol. 74, s. 327-347Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    Abstract Railway transportation systems are important for society and have many challenging and important planning problems. Train services as well as maintenance of a railway network need to be scheduled efficiently, but have mostly been treated as two separate planning problems. Since these activities are mutually exclusive they must be coordinated and should ideally be planned together. In this paper we present a mixed integer programming model for solving an integrated railway traffic and network maintenance problem. The aim is to find a long term tactical plan that optimally schedules train free windows sufficient for a given volume of regular maintenance together with the wanted train traffic. A spatial and temporal aggregation is used for controlling the available network capacity. The properties of the proposed model are analyzed and computational experiments on various synthetic problem instances are reported. Model extensions and possible modifications are discussed as well as future research directions.

    Ort, förlag, år, upplaga, sidor
    Elsevier, 2017
    Nyckelord
    Railway scheduling, Maintenance planning, Optimization
    Nationell ämneskategori
    Transportteknik och logistik Datavetenskap (datalogi) Beräkningsmatematik Datorsystem Annan data- och informationsvetenskap
    Identifikatorer
    urn:nbn:se:liu:diva-132961 (URN)10.1016/j.trc.2016.11.016 (DOI)000392038500020 ()
    Anmärkning

    Funding agencies: Swedish Transport Administration [TRV 2013/55886]

    Tillgänglig från: 2016-12-06 Skapad: 2016-12-06 Senast uppdaterad: 2018-11-05Bibliografiskt granskad
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  • 317.
    Liljengren, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell träteknik. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling.
    Adaptive sawing: - Yield of a concept in reality2009Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Limfog är basen för de massivträmöbler som görs av IKEA:s helägda leverantör Swedwood.Limfog består av lameller som kan produceras på olika sätt. Oavsett produktionsteknik görs deav brädor som kommer från ett sågverk. På sågverket finns det också sågsätt för att såga utbrädor ur stockar. Det här examensarbetet behandlar konceptet adaptiv sågning och dessimplementering på Swedwoods anläggning i Kostomuksha. Den grundläggande idén medkonceptet är att höja utbytet på råvaran. Detta uppnås bland annat genom att så lite som möjligtkantas bort på brädorna i sågverket. Brädorna sågas upp med vad man kan kalla genomsågning.När brädorna sedan förts till limfogsfabriken scannas de så att så mycket som möjligt ska kunnafås ut av varje bräda i form av lameller. Lamellerna som sågats ut kapas sedan upp i olikastorleksklasser beroende på kvalitet. Dessa limmas sedan ihop till limfog. Syftet med det härexamensarbetet är att ta fram utbytet från stock till färdig limfog för stockklasserna 135 – 148mm och 110 – 120 mm. Dessutom ska problemfaktorer identifieras och utbytet om möjligt höjas.För att uppnå detta syfte var det nödvändigt att ha säkra siffror för alla inblandade volymer isamtliga skeden. Stockarnas volym gav av en mätram vid timmersorteringen. Mycket kraft lasdärför ner för att säkerställa att dessa siffror var trovärdiga. Stockarna i den mindrediameterklassen mättes istället för hand och volym beräknades utifrån mätningarna. Stockarnasågades sedan på sågverket. Produktionshastigheten under sågningarna var låg och en delproblem i jämförelse med när sågning sker på mer traditionellt vis kunde noteras. Avsaknaden avkantning var huvudorsaken till dessa problem. Sågverkslinan visade sig vara olämplig för attsåga den mindre stockklassen, men kunde hantera stockar med en diameter på 135 – 148 mm.Utbytet för dessa var i linje med vad som kunde förväntas.I lamellproduktionslinjen kunde en del smärre produktionsproblem noteras och brädorna från defyra olika omgångarna av 135 – 148 mm stockar fick olika utbyte mest beroende på skillnader iråvarukvalitet. Utbytet från stock till limfog varierade från 17,6 % till 21,5 % och låg i snitt på19,3 %. Detta utbyte var lägra än vad som uppnåtts för adaptiv sågning på andra platser vidtidigare tester. De testerna utfördes dock på andra diameterklasser och det är därför svårt att raktav jämföra siffrorna. Dessutom kan råvaran ha varit något annorlunda. För att se hur mycketutbytet kunde höjas om andra lamellbredder användes förutom bara 46 mm, gjordessimuleringar. Totalutbytet kunde då höjas till i snitt 20,9 % i fall lamellbredderna 46, 55 och 60mm användes.En likadan simulering gjordes på materialet som producerades från diameterklassen 110 – 120mm. Totalutbytet för denna klass steg från 19,4 % till 22,4 % när fler lamellbredder användes.Eftersom det fanns viss oro att lamellerna skulle hålla lägre kvalitet övervakades de ilimfogsproduktionen. Oron visade sig obefogad. Att producera lameller från den diameterklassenär dock inte idealt eftersom den producerade volymen blir så liten.

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    Adaptive sawing master
  • 318.
    Liljengren, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell träteknik. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling.
    Adaptive sawing: Yield of a concept in reality2009Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Limfog är basen för de massivträmöbler som görs av IKEA:s helägda leverantör Swedwood.Limfog består av lameller som kan produceras på olika sätt. Oavsett produktionsteknik görs de av brädor som kommer från ett sågverk. På sågverket finns det också sågsätt för att såga utbrädor ur stockar. Det här examensarbetet behandlar konceptet adaptiv sågning och dessimplementering på Swedwoods anläggning i Kostomuksha. Den grundläggande idén med konceptet är att höja utbytet på råvaran. Detta uppnås bland annat genom att så lite som möjligtkantas bort på brädorna i sågverket. Brädorna sågas upp med vad man kan kalla genomsågning.När brädorna sedan förts till limfogsfabriken scannas de så att så mycket som möjligt ska kunnafås ut av varje bräda i form av lameller. Lamellerna som sågats ut kapas sedan upp i olikastorleksklasser beroende på kvalitet. Dessa limmas sedan ihop till limfog. Syftet med det härexamensarbetet är att ta fram utbytet från stock till färdig limfog för stockklasserna 135 – 148mm och 110 – 120 mm. Dessutom ska problemfaktorer identifieras och utbytet om möjligt höjas.

    För att uppnå detta syfte var det nödvändigt att ha säkra siffror för alla inblandade volymer isamtliga skeden. Stockarnas volym gav av en mätram vid timmersorteringen. Mycket kraft lasdärför ner för att säkerställa att dessa siffror var trovärdiga. Stockarna i den mindrediameterklassen mättes istället för hand och volym beräknades utifrån mätningarna. Stockarnasågades sedan på sågverket. Produktionshastigheten under sågningarna var låg och en delproblem i jämförelse med när sågning sker på mer traditionellt vis kunde noteras. Avsaknaden avkantning var huvudorsaken till dessa problem. Sågverkslinan visade sig vara olämplig för attsåga den mindre stockklassen, men kunde hantera stockar med en diameter på 135 – 148 mm.Utbytet för dessa var i linje med vad som kunde förväntas.

    I lamellproduktionslinjen kunde en del smärre produktionsproblem noteras och brädorna från defyra olika omgångarna av 135 – 148 mm stockar fick olika utbyte mest beroende på skillnader iråvarukvalitet. Utbytet från stock till limfog varierade från 17,6 % till 21,5 % och låg i snitt på19,3 %. Detta utbyte var lägra än vad som uppnåtts för adaptiv sågning på andra platser vidtidigare tester. De testerna utfördes dock på andra diameterklasser och det är därför svårt att raktav jämföra siffrorna. Dessutom kan råvaran ha varit något annorlunda. För att se hur mycketutbytet kunde höjas om andra lamellbredder användes förutom bara 46 mm, gjordessimuleringar. Totalutbytet kunde då höjas till i snitt 20,9 % i fall lamellbredderna 46, 55 och 60mm användes.

    En likadan simulering gjordes på materialet som producerades från diameterklassen 110 – 120mm. Totalutbytet för denna klass steg från 19,4 % till 22,4 % när fler lamellbredder användes.Eftersom det fanns viss oro att lamellerna skulle hålla lägre kvalitet övervakades de ilimfogsproduktionen. Oron visade sig obefogad. Att producera lameller från den diameterklassenär dock inte idealt eftersom den producerade volymen blir så liten.

    Ladda ner fulltext (pdf)
    Adaptive sawing master thesis
  • 319.
    Lin, Junyi
    et al.
    Xian Jiaotong Liverpool Univ, Peoples R China.
    Naim, Mohamed M.
    Cardiff Univ, Wales.
    Tang, Ou
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktionsekonomi. Linköpings universitet, Tekniska fakulteten.
    In-house or outsourcing? The impact of remanufacturing strategies on the dynamics of component remanufacturing systems under lifecycle demand and returns2024Ingår i: European Journal of Operational Research, ISSN 0377-2217, E-ISSN 1872-6860, Vol. 315, nr 3, s. 965-979Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We consider a component manufacturing and remanufacturing system where, due to the end-of-life warranty, new and after-sales demand must be satisfied. Two kinds of demand exhibit different lifecycle patterns with different scales and a time lag, while a third correlated component return lifecycle with again a different lag and scale, driven by adoption of remanufacturing, is also presented. To achieve supply and demand balance during demand lifecycles, companies need a strategic decision on their remanufacturing: remanufacturing outsourcing strategy (ROS) or remanufacturing in-house strategy (RIS), yet inadequately studied from system dynamics perspective. We developed base-stock system dynamics models and analytically explored the dynamic implications of RIS and ROS remanufacturing strategies under correlated lifecycle demand and returns. Applying z-transform and discrete time simulation, we found that RIS outperforms ROS system including less peak capacity cost, less inventory holding cost and less backlog cost. Also, the bullwhip of the RIS is always less than the ROS system. However, the adoption of the RIS may result longer-lasting manufacturing production and thus lead to a higher cost: an important cost needs to be strategically considered. Thereby, from system dynamics perspective, the component manufacturer needs carefully consider trade-offs between production and inventory costs, as well as their demand lifecycle characteristics to choose the right remanufacturing strategy.

  • 320.
    Lind, Sebastian
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Monteringsteknik. Linköpings universitet, Tekniska högskolan.
    Olsson, David
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Monteringsteknik. Linköpings universitet, Tekniska högskolan.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Monteringsteknik. Linköpings universitet, Tekniska högskolan.
    Exploring inter-organizational relationships within the remanufacturing of automotive components2011Ingår i: Proceedings of 1st International Conference on Remanufacturing: July 26-29, Glasgow, UK., 2011, s. 95-103Konferensbidrag (Refereegranskat)
    Abstract [en]

    Being a remanufacturer of automotive components may be problematic due toproblems with a steady flow of cores. The flow could be secured by making agreementswith core suppliers, which could be an OEM, a core broker or another actor on themarket. The remanufacturer can also choose to collect the cores without closercollaboration. One crucial aspect in choosing how to collect the cores is that it has to belucrative.The aim of this paper is to explore how remanufacturers manage their interorganizationalrelationships in the closed-loop supply chain. A case study was conductedwithin the European research project CAN-Reman, and empirical data was collected fromsix participating companies within the project, all European remanufacturers ofautomotive components. These companies were investigated, and their relationships,defined in earlier research with core suppliers, were evaluated.A key finding of the research is that the most problematic parameter withinrelationships is to receive the ordered quantity of cores from the supplier. This parameteris continually ranked as one of the most important, and the participating companies alsoclaim that they have problems with it. A successful relationship and take-back system thathas been pointed out by one of the companies is to never be the owner of the actual cores,and only perform the remanufacturing activity for an OEM.

  • 321.
    Lindahl, Daniel
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling.
    Stodell, Henric
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling.
    A Human Factors Analysis of Optical Distortion in Automotive Glazing2007Självständigt arbete på avancerad nivå (magisterexamen), 20 poäng / 30 hpStudentuppsats
    Abstract [en]

    The glazing is today a part of the car design. The customer is more or less taking for granted that his or her view from inside the car is a direct mirror of the outside world. With more complex shapes, lower installation angles and thinner glass it is a great challenge to produce even better quality at a lower price. While the windscreen is regulated by law, the lack of well specified requirements for the optics in the backlight (rear window), together with the absence of direct customer complaints, is causing the optical quality of the backlight to decrease. The requirements and measuring methods used today are described in technical terms and do not correspond to the human perception of optical distortion.

    This report is a first step towards new technical requirements, for the optics of backlights, based on the driver’s perception of optical distortion. The knowledge of how optical transmission distortion occurs, how it should be measured and how it affects the driver, is essential in order to control it.

    Several databases were searched and contacts with experts were established, in order to gain knowledge. The connection between the technical requirements and the human perception of optical distortion in backlights was investigated by using psychophysical methods. A within factorial design was employed with two independent variables; viewing distance from backlight to tailing object and fixation time (viewing time). The result showed a significant difference in perception of optical distortion between 25 and 75 metres. Moreover, optical distortion is, according to the test, more disturbing during free fixation time than for fixation times of about one second.

    The requirements often used for backlights today (12 ± 5 millimetres) allow distortions that 68 percent of the test subjects perceived as disturbing. In order to please the test driver from Volvo the requirements need to be as high as 12 ± 2 millimetres, which correspond to the 96th percentile. Furthermore, the result confirms that dynamic measurements are needed to find a connection to human perception of optical distortion. The principles of a new measuring method that measures the deformation and the dynamic distortion were developed to show the possibilities of measuring what the driver perceives.

    Even if a good measuring method can help controlling the produced glazing it is not enough to optimize the quality of the production. More important is the choice of thickness and curvature of the glass, the installation angle and the manufacturing method. It is important to set about the origin of the problem and develop a good routine of how to work with optical distortions. Optical distortions in backlights, similar to the tested backlight, have a low probability to disturb the driver in such extent that it has an effect on the driving. Nevertheless, it is a source of irritation and discomfort, which do not belong in a premium car.

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  • 322.
    Lindahl, Mattias
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska högskolan.
    Sakao, Tomohiko
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska högskolan.
    Rönnbäck, Anna
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell marknadsföring och industriell ekonomi. Linköpings universitet, Tekniska högskolan.
    Business Implications of Integrated Product Service Offerings and Resulting Potential Engineering Issues2009Ingår i: ICED 09 - The 17th International Conference on Engineering Design, vol 4:: Product and Systems Design / [ed] Norell Bergendahl, M.; Grimheden, M.; Leifer, L.; Skogstad, P.; Lindemann, U., The Design Society, 2009, s. 71-82Konferensbidrag (Refereegranskat)
    Abstract [en]

    In recent years there has been a shift in mechanical industry from a focus on physical products to product-service systems (PSS). The objective of this paper is to map out engineering implications and challenges based on five empirical examples of integrated product-service offerings (IPSOs). The paper is mainly based on case studies at Swedish manufacturing companies of different sizes. The following IPSOs were studied: (1) Lighting Function, (2) Core Plugs, (3) Material Handling, (4) Plate compacting, and (5) Thrust. These examples show that the orientation towards IPSOs implies several important strategic implications for a provider. Based on the examples, a discussion is presented concerning existing and potential engineering issues related to engineering requirements, development process and risks and opportunities with IPSOs.

  • 323.
    Lindblad, Emanuel
    et al.
    Linköpings universitet, Institutionen för beteendevetenskap och lärande, Pedagogik och sociologi.
    Hultgren, Josefin
    Linköpings universitet, Institutionen för beteendevetenskap och lärande, Pedagogik och sociologi.
    Arbetsmiljö i praktiken: – En kvantitativ studie om arbetsmiljö och personalomsättning inom Espresso House2016Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Syftet med studien är att studera den organisatoriska och sociala arbetsmiljön i utvalt distrikt inom Espresso House samt undersöka relationen mellan personalomsättning och arbetsmiljö. Studien har en kvantitativ ansats och har använt en enkätundersökning som datainsamlingsmetod.

    Resultatet visar att stöd och uppskattning från närmsta chef samt upplevelsen av att närmsta chef leder arbetet på ett tydligt sätt, är viktiga faktorer för hur baristorna uppfattar frågor gällande personalomsättning. Gällande den organisatoriska arbetsmiljön visar resultatet att de flesta baristorna är nöjda med ledning och styrning från sin närmsta chef. Resultatet visar på hög grad av delaktighet men mindre grad av handlingsutrymme. Den sociala arbetsmiljön på arbetsplatsen präglas av ett tämligen starkt positivt resultat där arbetskamraterna är viktiga för trivseln på arbetet.

    Sammanfattningsvis visar resultatet att mer inflytande över arbetstider samt mer resurser gällande personalomsättningsfrågor såsom mer tid till inskolning och satsning på mentorskap skulle kunna öka medarbetarnas benägenhet att stanna kvar inom företaget.

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    Arbetsmiljö i praktiken
  • 324.
    Lindbäck, Jan Erik
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan. Saab Aerostructures, Linköping, Sweden.
    Björnsson, Andreas
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan. Compraser, Linköping, Sweden.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    New Automated Composite Manufacturing Process:: Is it possible to find a cost effective manufacturing method with the use of robotic equipment?2012Ingår i: Proceedings of the 5th International Swedish Production Symposium / [ed] Mats Björkman, 2012, s. 523-531Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    The use of carbon composites has continuously increased in the commercial aircraft industry due to more challenging weight targets which is one way to handle the environmental requirements to lower the CO2 emissions. One aircraft structure component made at Saab Aerostructures is long and slender U-sections manufactured in carbon composites. The manufacturing is performed by manual layup of composite material. These U-sections are selected as an illustrative case in order to discuss possibilities for an automated manufacturing process with the aim to reduce cost. A literature review of different existing technologies have been performed and compared with the industrial front at Saab Aerostructures. Automated Tape Laying (ATL) and Automated Fibre Placement (AFP) are the two dominating automation methods, of today, for aircraft prepreg manufacturing. Both methods are heavy investments for small to medium size composite manufacturers. Analysis in the case has shown that the selected component cannot be automated with these two methods due to design constrains. The paper suggests that another automated method with a cutting machine in combination with an industrial robot with a vacuum gripper, is selected for further work. The proposed pick and place process is also assumed to reduce the material waste.

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    fulltext
  • 325. Beställ onlineKöp publikationen >>
    Lindgren, Ida
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell arbetsvetenskap.
    Towards the mitigation of cultural barriers to communication and cooperation2007Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    This thesis combines theories from cross-cultural psychology with literature on group faultlines to understand cultural barriers to communication and cooperation experienced in multinational emergency management teams. The aim is to investigate whether the faultline concept is a viable theoretical vocabulary for addressing cultural differences in communication and cooperation (in the domain of emergency management). Culture is defined as a relatively organized system of shared meanings which influences people’s cognition, values, behaviors, and so on. Group faultlines are hypothetical dividing lines that may split a team into homogeneous subgroups based on demographic characteristics. Three papers are included in the thesis, all of which investigate various aspects of group behavior in relation to emergency management. Results suggest that faultlines can be formed not only by demographic characteristics, but also by culturally-driven behavior. The results presented in the papers and in this thesis are meant to supply emergency management personnel with general knowledge of cultural differences and ideas for future ‘cultural awareness’ training. The thesis contributes to the scientific community by taking cross-cultural research into the applied domain so that its findings can be made relevant to people in multinational organizations.

    Delarbeten
    1. A case study of information and communication technology in emergency management training
    Öppna denna publikation i ny flik eller fönster >>A case study of information and communication technology in emergency management training
    2006 (Engelska)Ingår i: International Journal of Emergency Management, ISSN 1471-4825, E-ISSN 1741-5071, Vol. 3, nr 4, s. 332-347Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    This paper addresses the roles of Information and Communication Technology (ICT) in training for effective emergency management and inter-organisational coordination. Collocation can encourage the development of common ground and trust and, in turn, result in greater efficiency and effectiveness. We expect to find communication and artefact use during collocated training that cannot readily transfer to the ICT used to link distributed work settings. This expectation makes the reliance on ICT and distributed work during emergency management operations suspect. To test these claims, we observed a large-scale, real-time exercise designed to facilitate cooperation among electricity and telecommunications companies. The exercise scenario was similar to the January 2005 windstorm that left much of southern Sweden without electricity or telephone service and revealed the need for better cooperation among utility providers. The observations suggest that while collocation is clearly beneficial, a mismatch in ICT use between collocated training and distributed emergency management operations is likely to be detrimental for preparedness.

    Nyckelord
    emergency management; training; artefact use; collocated work; distributed work; real-time exercise; inter-organisational coordination; cooperation; information technology; communications; ICT; Sweden; electricity companies; telecommunications companies
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-12838 (URN)10.1504/IJEM.2006.011300 (DOI)
    Tillgänglig från: 2007-12-19 Skapad: 2007-12-19 Senast uppdaterad: 2023-10-12
    2. Using Microworlds to Understand Cultural Influences on Distributed Collaborative Decision Making in C2 Settings
    Öppna denna publikation i ny flik eller fönster >>Using Microworlds to Understand Cultural Influences on Distributed Collaborative Decision Making in C2 Settings
    2006 (Engelska)Ingår i: Proceedings from the 11th International Command and Control Research and Technology Symposium , Cambridge, UK, 26-28 September, 2006Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    As a means to facilitate coordination of international relief teams during sudden onset disasters, the UN has formed a structure called the On Site Operations Coordination Center (OSOCC). The main objective of the OSOCC is to coordinate international relief teams and help local authorities re-establish control in the affected area. As with any operation where people from different parts of the world are involved, multiculturalism can become an issue. Differences in values, norms and attitudes can create problems in communication, planning and execution of the operation. We use the C3Fire microworld and the Schwartz Value Survey as our main instruments to study cultural influences in command and control decision making in simulated OSOCC. The C3Fire microworld has been used extensively in research on networked-based command and control. Augmented with observation of a real OSOCC exercise, the experimental studies provide the basis for formulating clusters of behavioral differences in command and control that one can expect to encounter during an international operation. Results show that culturally-driven differences in planning and leadership style can pose potential barriers to efficient decision making in multicultural command-and-control centers.

    Nyckelord
    C2 Experimentation, Social Domain Issues, Cognitive Domain Issues
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-12839 (URN)
    Tillgänglig från: 2007-12-19 Skapad: 2007-12-19 Senast uppdaterad: 2014-12-19
    3. Identifying Cross-Cultural Group Faultlines
    Öppna denna publikation i ny flik eller fönster >>Identifying Cross-Cultural Group Faultlines
    Manuskript (Övrigt vetenskapligt)
    Identifikatorer
    urn:nbn:se:liu:diva-12840 (URN)
    Tillgänglig från: 2007-12-19 Skapad: 2007-12-19 Senast uppdaterad: 2010-01-13
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  • 326.
    Lindholm, Anna
    et al.
    Lund University, Sweden.
    Quttineh, Nils-Hassan
    Linköpings universitet, Matematiska institutionen, Optimeringslära. Linköpings universitet, Tekniska högskolan.
    Lidestam, Helene
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktionsekonomi. Linköpings universitet, Tekniska högskolan.
    Hierarchical Production Scheduling: A Case Study at Perstorp2014Ingår i: 24th European Symposium on Computer Aided Process Engineering / [ed] Jiří Jaromír Klemeš, Petar Sabev Varbanov and Peng Yen Liew, Elsevier, 2014, s. 511-516Konferensbidrag (Refereegranskat)
    Abstract [en]

    Planning and scheduling are functions that have large economic impact in the chemical process industry. For integrated sites with many interconnected production areas, obtaining production schedules that respect all production-related constraints is a complex task. One important issue is the constraints due to disturbances in utilities, such as steam and cooling water. These are often site-wide disturbances that may make it impossible to maintain desired production rates in several production areas at a site. In this study, scheduling at two levels of the functional hierarchy at a site of a world lead chemical industry, Perstorp, is handled. The activities are denoted production scheduling (PS) and detailed production scheduling (DPS). Real data of incoming orders and utility disturbances are used to produce a production schedule and detailed production schedule for one month. The PS and DPS problems are formulated as optimization problems, where production-related constraints such as production rate constraints, inventory limitations, and start-up costs are included. The objective functions of the PS and DPS problems are formulated to reflect the importance of different issues at the site. The procedure aims to show how the hierarchical optimization framework may be used to provide decision support for how to operate the production at a site in order to maximize profit while minimizing the effects of site-wide disturbances.

  • 327.
    Lindholm, Jim
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Is Design Automation a Feasible Tool for Improving Efficiency in Production Planning and Manufacturing Processes?2018Ingår i: Proceedings of the 8th Swedish Production Symposium (SPS 2018), Elsevier, 2018, Vol. 25, s. 8s. 194-201Konferensbidrag (Refereegranskat)
    Abstract [en]

    The production planning is a repetitive process that demands engineering hours and expertise. Many parameters must be considered, and inefficiencies lead to increased lead times. The hypothesis is that valuable time within the manufacturing stages can be saved through improved engineering tools. This article will explore to possibilities to increase the utilization of digital tools to support the engineers in their production planning activities, and to improve the efficiency of manufacturing processes. Through study visits and interviews at a product owning company with manufacturing in-house, proposals for areas that could be improved with design automation will be presented.

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    fulltext
  • 328. Beställ onlineKöp publikationen >>
    Lindkvist Haziri, Louise
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Improving Design for Remanufacturing Though Feedback from Remanufacturing to Design2020Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [sv]

    Den höga efterfrågan på produkter i vårt samhälle innebär att tillverkning av produkter och hur de behandlas under hela deras livscykel är betydande för miljöpåverkan. Detta eftersom allt ifrån tillverkning till hur en produkt tas om hand när den är förbrukad, bidrar till produktens totala miljöpåverkan. Initiativ såsom införandet av cirkulär ekonomi är tänkt att främja ekonomisk tillväxt utan att påverka miljön negativt. Cirkulär ekonomi kan också ses som ett system där användning, underhåll, återanvändning, återtillverkning och återvinning av produkter och material optimeras för att tillvarata och göra det mesta av den energi och det material som använts för att tillverka produkten. Denna doktorsavhandling fokuserar på återtillverkning, såsom ett hållbart sätt att behandla produkter som inte längre används. Återtillverkning är en industriell process där en begagnad produkt återställs till nyskick och på så sätt sparas energi och material, jämfört med nytillverkning.

    En produkt som är avsedd för återtillverkning bör ha vissa egenskaper såsom att vara enkel att rengöra, enkel att demontera och enkel att montera. Genom att tillämpa konstruktion för återtillverkning (eng. design for remanufacturing (DfRem)) kan kostnader inom återtillverkning sparas eftersom tidsåtgången reduceras. Integrering av DfRem i produktutvecklingsprocessen är därför viktigt för att uppnå en effektivare återtillverkningsprocess. I nuläget används dock inte DfRem i någon större utsträckning inom industrin. DfRem kräver kunskap om återtillverkning, både i allmänhet, och om den specifika återtillverkningsprocessen för den aktuella produkten i synnerhet. Därför behövs feedback från återtillverkning till produktutveckling för att konstruktörer ska kunna göra korrekta konstruktionsöverväganden. Syftet med denna doktorsavhandling är att utöka aktuell kunskap om feedback från återtillverkning till produktutveckling och hur den kan användas för att förbättra DfRem.

    För att uppnå syftet genomfördes både litteraturstudier och flera fallstudier. Fallstudierna inkluderar tre företag som konstruerar, tillverkar och återtillverkar sina produkter. Datainsamlingen genomfördes främst genom semistrukturerade intervjuer. Resultaten från de tre fallstudierna har även undersökts i en syntes från de olika fallstudierna.

    Litteraturstudierna visade att den potentiella feedbacken från återtillverkning till produktutveckling kan delas in i tre huvudkategorier; från återtillverkningspersonalen, relaterad till processen för återtillverkning eller relaterad till komponenten som ska återtillverkas. Vidare hittades potentiell feedback hos fallföretagen. För närvarande förblir emellertid den potentiella feedbacken outnyttjad vid de fallföretag som presenteras i denna avhandling. Fallstudierna visade att det finns hinder för feedback från återtillverkning till produktutveckling; såsom brist på kunskap, brist på incitament och organisatoriska hinder. Det finns emellertid också möjliggörare såsom; potentiella affärsmöjligheter, ökad kundvilja, och lagar, regler och standarder som uppmuntrar till mer hållbara produkter.

    I denna doktorsavhandling presenteras ett ramverk för att förbättra implementering av DfRem, eftersom användningen av DfRem och feedback från återtillverkning till produktutveckling är bristfällig i de fall som studerats. Ramverket (eng. the Remanufacturing Information Feedback Framework (RIFF)) fokuserar på att överbrygga hinder för feedback från återtillverkning till produktutveckling. Vidare främjar tillämpningen av RIFF implementeringen av DfRem-metoder och -verktyg, som, när de tillämpas, skulle kunna göra återtillverkning mer effektiv. Följaktligen kan ökad tillämpning av DfRem att bidra till den totala tillväxten av återtillverkningsmarknaden, vilket skulle innebära minskad negativ miljöpåverkan och även gynna en mer cirkulär ekonomi

    Delarbeten
    1. Life-Cycle Information Feedback to Product Design
    Öppna denna publikation i ny flik eller fönster >>Life-Cycle Information Feedback to Product Design
    2012 (Engelska)Ingår i: Proceedings of the 5th Swedish Production symposium (SPS'12), The Swedish Production Academy , 2012, s. 99-105Konferensbidrag, Enbart muntlig presentation (Övrigt vetenskapligt)
    Abstract [en]

    A key to sustainable product development is to consider the entire product life-cycle, as well as the requirements on product design in the different life-cycle phases. Improvements in product design can be based on information feedback from the product life-cycle. The aim of this paper is to identify sources of information from the product life-cycle for product design, as well as what benefits the retrieval of such information feedback can have for the product development process. The method udes for this paper was a literature review, utilizing the Scopus and Science Direct databases. Feedback information on the design phase can stream from the product life-cycle phases of manufacturing, use, service and edn-of-life. The feedback includes objective and subjective data from customers, users, service technicians and company staff involved in the product life-cycle. The feedback from the product life-cycle needs to be managed well, and relevant information should be available to the product development team in the design phase. Sucg information flows are valuable in supporting the design of products to facilitate the entire product life-cycle.

    Ort, förlag, år, upplaga, sidor
    The Swedish Production Academy, 2012
    Nationell ämneskategori
    Övrig annan teknik
    Identifikatorer
    urn:nbn:se:liu:diva-87524 (URN)978-91-7519-752-4 (ISBN)
    Konferens
    5th International Swedish Production Symposium (SPS 2012), 6-8 November 2012, Linköping, Sweden
    Tillgänglig från: 2013-01-18 Skapad: 2013-01-18 Senast uppdaterad: 2020-03-05Bibliografiskt granskad
    2. Towards facilitating circular product life-cycle information flow via remanufacturing
    Öppna denna publikation i ny flik eller fönster >>Towards facilitating circular product life-cycle information flow via remanufacturing
    2015 (Engelska)Ingår i: Procedia CIRP, ISSN 2212-8271, E-ISSN 2212-8271, Vol. 29, s. 780-785Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    In order to achieve a sustainable development, circular economy approaches and circular material flows are explored in industry. However, circular information flows remain essentially unestablished. The aim of this paper is to: 1) explore categories and types of product life-cycle information available for remanufacturing; 2) identify constraints for efficient product life-cycle information flow via remanufacturing; and 3) propose initiatives to facilitate product life-cycle information flow via remanufacturing.

    Data was collected through workshops and interviews at five remanufacturing companies. An accumulated Sankey diagram illustrates product life-cycle information flow, losses and bottleneck. Based on the analysis, possible initiatives to facilitate efficient product life-cycle information flow via remanufacturing are presented.

    Ort, förlag, år, upplaga, sidor
    Elsevier, 2015
    Nyckelord
    Remanufacturing; Product life-cycle stackeholder; Feedback; Feed forward; Sankey diagram
    Nationell ämneskategori
    Annan samhällsbyggnadsteknik
    Identifikatorer
    urn:nbn:se:liu:diva-120761 (URN)10.1016/j.procir.2015.02.162 (DOI)000356146100132 ()
    Konferens
    22nd CIRP Conference on Life Cycle Engineering (LCE), Univ New S Wales, Sydney, AUSTRALIA, April 7-9, 2015
    Projekt
    Återprodukt, KEAP2
    Forskningsfinansiär
    VINNOVA
    Tillgänglig från: 2015-08-24 Skapad: 2015-08-24 Senast uppdaterad: 2020-03-05Bibliografiskt granskad
    3. Assessing barriers for available life-cycle information feedback transfer to product design
    Öppna denna publikation i ny flik eller fönster >>Assessing barriers for available life-cycle information feedback transfer to product design
    2015 (Engelska)Ingår i: ICoR- 2nd International Conference on Remanufacturing, 2015Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    The design of products greatly influences the performance of the product in the rest of the product’s life-cycle phases, e.g. manufacturing, use/maintenance and end-of-life processes. In order to design more sustainable products, information from all life-cycle phases should be implemented in structured ways via e.g. eco-design tools in the design process. Remanufacturing is one viable end-of-life strategy that is environmentally beneficial as it will preserve most of the material and energy put into the initial product and/or its components. Although the product design determines a large portion of the remanufacturability of a product, few companies apply design for remanufacturing on their products.The aim of this paper is to show what type of feedback is available at remanufacturers, and to explore the barriers that prevent that feedback from reaching product development. Using the case study methodology, data have been collected through semi-structured interviews with four remanufacturing companies focusing on the information exchange between the departments of remanufacturing and product development.The case study results show that there is feedback from the remanufacturers concerning a wide variety of design aspects. Furthermore, the remanufacturers have feedback about information they lack from design and the use phase including service. At present, however, there is no feedback provided from remanufacturing to design in the cases studied. Thus, the barriers for providing available life-cycle information feedback are assessed. There are both internal and external barriers. Between design and remanufacturing the barriers include e.g. lack of knowledge and organisational aspects. Further influencing the lack of feedback are managerial aspects such as the business case and specifications lacking remanufacturing aspects and thus not supporting design for remanufacturing. However, design changes such as different joining methods, a higher degree of standardization and different material selections could be very beneficial for remanufacturing and thus the environment.

    Nyckelord
    Remanufacturing, design for remanufacturing, life-cycle information feedback, feedback barriers, case studies
    Nationell ämneskategori
    Produktionsteknik, arbetsvetenskap och ergonomi
    Identifikatorer
    urn:nbn:se:liu:diva-126999 (URN)
    Konferens
    ICoR- 2nd International Conference on Remanufacturing, Amsterdam, Netherlands, 14-16 June 2015
    Projekt
    KEAP 2
    Forskningsfinansiär
    VINNOVA, 1414323700
    Tillgänglig från: 2016-04-11 Skapad: 2016-04-11 Senast uppdaterad: 2020-03-05Bibliografiskt granskad
    4. The role of Product-Service Systems regarding information feedback transfer in the product life-cycle including remanufacturing
    Öppna denna publikation i ny flik eller fönster >>The role of Product-Service Systems regarding information feedback transfer in the product life-cycle including remanufacturing
    2016 (Engelska)Ingår i: PRODUCT-SERVICE SYSTEMS ACROSS LIFE CYCLE, 2016, Vol. 47, s. 311-316Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    With a Product-Service System (PSS), the producer often has control of its products during multiple life-cycles, and thus there are more incentives for design for service and remanufacturing in comparison to traditional sales. The aim of this paper is to explore the role of PSS regarding information feedback transfer in the product life-cycle including remanufacturing. The paper explores two industrial cases where PSS does not yet act as a facilitator for transferring information feedback from remanufacturing to product designers. However, the full potential of PSS is not yet utilized at the companies, and their products are neither designed for PSS nor remanufacturing. (C) 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license.

    Serie
    Procedia CIRP, ISSN 2212-8271
    Nyckelord
    Product life-cycle information; PSS; Remanufacturing
    Nationell ämneskategori
    Produktionsteknik, arbetsvetenskap och ergonomi
    Identifikatorer
    urn:nbn:se:liu:diva-133141 (URN)10.1016/j.procir.2016.03.088 (DOI)000387505100053 ()
    Konferens
    Conference on Product-Service Systems across Life Cycle. Bergamo, Italy, JUN 20-21, 2016
    Tillgänglig från: 2016-12-12 Skapad: 2016-12-09 Senast uppdaterad: 2020-09-28
    5. Feedback from Remanufacturing: Its Unexploited Potential to Improve Future Product Design
    Öppna denna publikation i ny flik eller fönster >>Feedback from Remanufacturing: Its Unexploited Potential to Improve Future Product Design
    2019 (Engelska)Ingår i: Sustainability, E-ISSN 2071-1050, Vol. 11, nr 15, s. 1artikel-id 4037Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    Company interest and research in the circular economy and remanufacturing have increased as a means of reducing negative environmental impacts. Remanufacturing is an industrial process whereby used products are returned to a state of like-new. However, few products are designed for remanufacturing, and further research and industrial efforts are needed to facilitate more widespread use of design for remanufacturing. One crucial factor facilitating design for remanufacturing is the integration of feedback in the product design process. Thus, the objective of this paper is to analyse feedback flows from remanufacturing to product design. Hence, a literature study and multiple case studies were conducted at three companies that design, manufacture and remanufacture different kinds of products. The cross-case analysis revealed the five barriers of the lack of internal awareness, lack of knowledge, lack of incentives, lack of feedback channels and non-supportive organisational structures, and the five enablers of business opportunities, integrated design processes, customers’ demand, laws, regulations and standards, and new technologies. To establish improved feedback from remanufacturing to product design, the barriers need to be addressed and the enablers explored. Thus, improved feedback from remanufacturing to product design will improve the design of future products suited for a more circular economy.

    Ort, förlag, år, upplaga, sidor
    MDPI, 2019. s. 1
    Nyckelord
    feedback; remanufacturing; case studies; design for remanufacturing; circular economy; reduction in negative environmental impacts
    Nationell ämneskategori
    Produktionsteknik, arbetsvetenskap och ergonomi
    Identifikatorer
    urn:nbn:se:liu:diva-160140 (URN)10.3390/su11154037 (DOI)000485230200042 ()2-s2.0-85070450645 (Scopus ID)
    Tillgänglig från: 2019-09-09 Skapad: 2019-09-09 Senast uppdaterad: 2022-02-10Bibliografiskt granskad
    6. Supporting design for remanufacturing: A framework for implementing information feedback from remanufacturing to product design
    Öppna denna publikation i ny flik eller fönster >>Supporting design for remanufacturing: A framework for implementing information feedback from remanufacturing to product design
    2020 (Engelska)Ingår i: Journal of Remanufacturing, ISSN 2210-464X, Vol. 10, s. 57-76Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    Remanufacturing is an industrial process turning used products into a condition of like new or better. Remanufacturing is also one strategy that salvages the value put into products during manufacturing and thus reduces the environmental impact of products over the life-cycle. However, not many products are designed for remanufacturing, and there is rarely any feedback from remanufacturing to design. Since design for remanufacturing is not applied at most manufacturing companies, there is a need to support companies, for example, by information feedback methods. By implementing feedback transfer from remanufacturing to design and employing design for remanufacturing, the remanufacturing process is more likely to be effective and efficient. The aim of this paper is to present a framework that supports design for remanufacturing by the implementation of structured feedback from remanufacturing to design. The framework aims at strategically outlining and practically implementing information feedback from remanufacturing to design. A case company where the framework has been initialised is also presented.

    Ort, förlag, år, upplaga, sidor
    Springer, 2020
    Nationell ämneskategori
    Övrig annan teknik
    Identifikatorer
    urn:nbn:se:liu:diva-160139 (URN)10.1007/s13243-019-00074-7 (DOI)
    Tillgänglig från: 2019-09-09 Skapad: 2019-09-09 Senast uppdaterad: 2020-09-27Bibliografiskt granskad
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    fulltext
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    presentationsbild
  • 329.
    Lindkvist Haziri, Louise
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Sakao, Tomohiko
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska fakulteten.
    Feedback from Remanufacturing: Its Unexploited Potential to Improve Future Product Design2019Ingår i: Sustainability, E-ISSN 2071-1050, Vol. 11, nr 15, s. 1artikel-id 4037Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Company interest and research in the circular economy and remanufacturing have increased as a means of reducing negative environmental impacts. Remanufacturing is an industrial process whereby used products are returned to a state of like-new. However, few products are designed for remanufacturing, and further research and industrial efforts are needed to facilitate more widespread use of design for remanufacturing. One crucial factor facilitating design for remanufacturing is the integration of feedback in the product design process. Thus, the objective of this paper is to analyse feedback flows from remanufacturing to product design. Hence, a literature study and multiple case studies were conducted at three companies that design, manufacture and remanufacture different kinds of products. The cross-case analysis revealed the five barriers of the lack of internal awareness, lack of knowledge, lack of incentives, lack of feedback channels and non-supportive organisational structures, and the five enablers of business opportunities, integrated design processes, customers’ demand, laws, regulations and standards, and new technologies. To establish improved feedback from remanufacturing to product design, the barriers need to be addressed and the enablers explored. Thus, improved feedback from remanufacturing to product design will improve the design of future products suited for a more circular economy.

    Ladda ner fulltext (pdf)
    fulltext
  • 330.
    Lindkvist, Louise
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Alonso Movilla, Natalia
    University of Grenoble, Saint-Martin-d'Hères, France.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Zwolinski, Peggy
    University of Grenoble, Saint-Martin-d'Hères, France.
    Investigating types of information from WEEE take-back systems in order to promote Design for Recovery2016Ingår i: Sustainability through innovation in product life cycle design / [ed] Matsumoto, M., Masui, K., Fukushige, S., Kondoh, S, Springer, 2016Konferensbidrag (Refereegranskat)
    Abstract [en]

    WEEE (Waste Electrical and Electronic Equipment) recovery facilities have been set up for the last decade to promote a circular economy. Their activities focus on the reuse, remanufacturing and/or recycling of products. Currently, little information reaches designers regarding the requirements that these facilities have on product design. Therefore, most products are not designed to be properly recovered. The aim of this paper is to explore the nature of product life-cycle information from recovery organisations that could be shared in order to improve resource efficiency. The focus is on how information exchange can benefit the end-of-life phase of forthcoming designed products. Two levels of information have been identified, macroscopic and microscopic. Our study is illustrated with a detailed analysis of the French WEEE compliance scheme and an in-depth analysis of an IT remanufacturing facility in Sweden.  Based on the cases studies we have identified current and potential information flows between different stakeholders that could benefit design for recovery.

  • 331.
    Lindkvist, Louise
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Assessing barriers for available life-cycle information feedback transfer to product design2015Ingår i: ICoR- 2nd International Conference on Remanufacturing, 2015Konferensbidrag (Refereegranskat)
    Abstract [en]

    The design of products greatly influences the performance of the product in the rest of the product’s life-cycle phases, e.g. manufacturing, use/maintenance and end-of-life processes. In order to design more sustainable products, information from all life-cycle phases should be implemented in structured ways via e.g. eco-design tools in the design process. Remanufacturing is one viable end-of-life strategy that is environmentally beneficial as it will preserve most of the material and energy put into the initial product and/or its components. Although the product design determines a large portion of the remanufacturability of a product, few companies apply design for remanufacturing on their products.The aim of this paper is to show what type of feedback is available at remanufacturers, and to explore the barriers that prevent that feedback from reaching product development. Using the case study methodology, data have been collected through semi-structured interviews with four remanufacturing companies focusing on the information exchange between the departments of remanufacturing and product development.The case study results show that there is feedback from the remanufacturers concerning a wide variety of design aspects. Furthermore, the remanufacturers have feedback about information they lack from design and the use phase including service. At present, however, there is no feedback provided from remanufacturing to design in the cases studied. Thus, the barriers for providing available life-cycle information feedback are assessed. There are both internal and external barriers. Between design and remanufacturing the barriers include e.g. lack of knowledge and organisational aspects. Further influencing the lack of feedback are managerial aspects such as the business case and specifications lacking remanufacturing aspects and thus not supporting design for remanufacturing. However, design changes such as different joining methods, a higher degree of standardization and different material selections could be very beneficial for remanufacturing and thus the environment.

    Ladda ner fulltext (pdf)
    fulltext
  • 332.
    Lindkvist, Louise
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    The role of Product-Service Systems regarding information feedback transfer in the product life-cycle including remanufacturing2016Ingår i: PRODUCT-SERVICE SYSTEMS ACROSS LIFE CYCLE, 2016, Vol. 47, s. 311-316Konferensbidrag (Refereegranskat)
    Abstract [en]

    With a Product-Service System (PSS), the producer often has control of its products during multiple life-cycles, and thus there are more incentives for design for service and remanufacturing in comparison to traditional sales. The aim of this paper is to explore the role of PSS regarding information feedback transfer in the product life-cycle including remanufacturing. The paper explores two industrial cases where PSS does not yet act as a facilitator for transferring information feedback from remanufacturing to product designers. However, the full potential of PSS is not yet utilized at the companies, and their products are neither designed for PSS nor remanufacturing. (C) 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license.

    Ladda ner fulltext (pdf)
    fulltext
  • 333.
    Lindkvist, Louise
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    The role of Product-Service Systems regarding information feedback transfer in the product life-cycle including remanufacturing2016Ingår i: PRODUCT-SERVICE SYSTEMS ACROSS LIFE CYCLE, 2016, Vol. 47, s. 311-316Konferensbidrag (Refereegranskat)
    Abstract [en]

    With a Product-Service System (PSS), the producer often has control of its products during multiple life-cycles, and thus there are more incentives for design for service and remanufacturing in comparison to traditional sales. The aim of this paper is to explore the role of PSS regarding information feedback transfer in the product life-cycle including remanufacturing. The paper explores two industrial cases where PSS does not yet act as a facilitator for transferring information feedback from remanufacturing to product designers. However, the full potential of PSS is not yet utilized at the companies, and their products are neither designed for PSS nor remanufacturing. (C) 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license.

    Ladda ner fulltext (pdf)
    fulltext
  • 334.
    Lindkvist, Louise
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    The Use of Product Life-Cycle Information in a Value Chain including Remanufacturing2013Ingår i: Re-engineering Manufacturing for Sustainability: Proceedings of the 20th CIRP International Conference on Life Cycle Engineering, Singapore 17-19 April, 2013 / [ed] Andrew Y.C. Nee, Bin Song, and Soh-Khim Ong, Singapore: Springer, 2013, s. 621-626Konferensbidrag (Refereegranskat)
    Abstract [en]

    Product life-cycle information is used to improve a product’s performance over its life-cycle. The objective of this paper is to describe how information from the product life-cycle phases of design, manufacturing, use, service and end-of-life are used and handled in a value chain comprised of an international original equipment manufacturer with its suppliers and contracted remanufacturers. A case study of a value chain was conducted. The paper concludes that the information flows within the value chain studied are well-functioning; however the organizational structure seems to be a hindrance for full information exchange within the value chain.

  • 335.
    Lindkvist, Louise
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Sakao, Tomohiko
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska högskolan.
    Exploring the Use of Product Life-Cycle Information in Two Value Chains Including Remanufacturing2013Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    Not many products are designed for remanufacturing. One of the reasons may be that the information flows to and from remanufacturers are not in level with the other information flows in the product life-cycle. In this paper, the information flows within two value chains including remanufacturing and PSS are investigated. The case studies show that the remanufacturing part of the value chain is not strongly included in the information flows in the product life-cycle. This means that valuable feedback about the product design and condition at end-of-life is neglected. Further, information feed forward, which could potentially make the remanufacturing process more efficient, is not satisfactorily implemented.

  • 336.
    Lindqvist, Jonas
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktionsekonomi. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling.
    Lund, Linus
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktionsekonomi. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling.
    Emission allowance origination and trading: How does it affect ABB and its Group Treasury Operations?2009Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats
    Abstract [en]

    The purpose of the thesis is to determine how ABB’s treasury department (GTO) should respond to an increasing awareness and interest in the carbon credit markets. Emission caps have been introduced on national levels and also for certain industries in Europe as a consequence of the Kyoto Protocol. This allows for trading of certain carbon credits as well as for the creation of new credits. ABB is a company which has many solutions for efficient energy use; solutions that aim to reduce electricity cost and in the prolongation also emissions. The awareness of the carbon market is growing within ABB, but no carbon credit generating projects have been completed and the initiatives are scattered. The thesis describes the Kyoto Protocol and its implementation within EU, the markets available for trading by companies as well as what instruments and derivatives exist. With the underlying regulations described an empirical study of ABB’s involvement is conducted. The study shows that ABB has few installations with emissions caps and that the potential for generating new credits as a way to increase profit is quite big. However, there have been no carbon generating projects registered up to this point and there are many barriers to overcome before ABB receives any carbon credits.To ensure a thorough analysis, a model of factors affecting ABB’s carbon credit involvement is formed. The model is based on the available literature on the subjects organizational performance, transfer pricing, project- and financial risk and risk management.GTO’s immediate response should be to set up a pool to which subsidiaries with compliance requirements are to send their carbon credits. The pool will then redistribute the credits so that each subsidiary’s needs are fulfilled and finally settle the net remainder on the open market. A unit independent of GTO, called Group Carbon Operations (GCO) in the thesis, should be formed in the near future with responsibility to actively follow the progress of CDM pilot projects and to facilitate their implementation. Depending on the outcome of these pilot-projects ABB can then either, in case of a negative outcome, quickly end the direct CDM involvement and reach closure or, in case of a positive outcome, further develop the GCO department to profit from ABBs involvement in the CDM market. In case of a positive outcome, the GTO should be further involved regarding risk handling and internal pricing.

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  • 337.
    Lindstrand, Mikael
    Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
    Gloss: measurement, characterization and visualization - in the light of visual evaluation2002Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    Gloss is one essential characteristic of print quality but it is, as has long been known, a far more complex visual concept than the present methods of instrumental gloss evaluation are able to characterize.

    A measurement tool, aimed to characterize the visually most important gloss features, has been developed. The tool provides a "Reflection Vector Map" (RVM) which simultaneously contains spatially resolved information about directed reflectance and apparent inclination. The RVM is comprehensive gloss information that at the same time has an intuitive interpretation.

    A model to describe the perceived homogeneity of gloss has been developed. The gloss homogeneity index: "Gloss Angle Smoothness" (GAS), derived from the RVM is calculated by weighting perceptually "positive" and "negative" components of gloss homogeneity, aimed to be a predictor of how homogeneous the surface is perceived with respect to gloss. The gloss homogeneity was considered to be difficult to evaluate visually; experienced judges were in better agreement than inexperienced judges. The GAS correlated considerably better to the results of the panel of experienced judges, than did the results of a panel of inexperienced judges.

    A computer visualization environment that uses the RVM as input, yielding a virtual reality for gloss evaluation of surfaces, was developed. The environment is able by simulation to mediate multiple perceptually important aspects of gloss, under well-defined and accurate observation conditions. The feature of interactivity, facilitating inspection under a range of different illumination-surface-observer-setup conditions, further adds to the sensation of high fidelity and even "presence" during inspection. Thus the environment has a potential to act as a tool during visual assessment, e.g. pair-wise comparison. Results from visual evaluations of physical and simulated demanding surfaces correlated well, with less inter-judge variance for the visualization environment than for the physical surfaces. This provides an indication of the potential both of the measurement and of the visualization systems.

  • 338.
    Lindström, Jörgen
    Linköpings universitet, Institutionen för datavetenskap. Linköpings universitet, Tekniska högskolan.
    Chefers användning av kommunikationsteknik1996Licentiatavhandling, monografi (Övrigt vetenskapligt)
    Abstract [en]

    Under senare år har affärsmiljön för de flesta företag förändrats i snabb takt samtidigt som informations- och kommunikationstekniken genomgått en snabb utveckling. Den förändrade affärsmiljön kan tänkas förändra arbetssituationen för exempelvis chefer. Eftersom tidigare studier visat att ett mycket väsentligt inslag i chefers arbete är kommunikation skulle den nya tekniken kunna användas för att möta denna förändring i arbetssituation. Syftet med den här studien är mot denna bakgrund att skapa en förståelse för chefers inställning till och användning av kommunikationsteknik.Studien har huvudsakligen genomförts genom intervjuer med chefer i två företag. Totalt har sexton chefer och sju medarbetare till dessa chefer intervjuats. De i studien intervjuade cheferna upplever en arbetssituation som är mycket tidspressad, med fragmenterade arbetsdagar, ett högt kommunikationstryck och ont om tid till ostört arbete. Vidare uttrycker respondenterna av en mängd olika skäl en stark preferens för kommunikation ansikte mot ansikte. Denna preferens är delvis en följd av att arbetsuppgifterna ibland är så komplexa att de kräver ett personligt möte för att kunna hanteras effektivt. En annan mycket viktig aspekt är de symboliska faktorerna, att chefen genom att närvara personligen signalerar att en viss fråga, en viss enhet, en viss kund etc. är viktig för organisationen.Vad gäller användandet av kommunikationsteknik så förefaller det av studien att döma som om modern teknik i ganska liten utsträckning används för att minska resande och lätta på arbetsbördan för den studerade kategorin människor. Detta tycks bero på att man av sociala, symboliska och andra skäl vill och behöver träffas personligen. Dessa krav och önskemål på kontakter ansikte mot ansikte tycks vara så starka att inte ens mycket sofistikerad teknik kan ersätta den typen av kontakter. Det tycks i stället närmast vara så att teknikutvecklingen ökat mängden kommunikation genom att kommunikation via exempelvis mobiltelefon eller elektronisk post till viss del adderats till den tidigare kommunikationen.

  • 339.
    Lindström, Veronica
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktionsekonomi. Linköpings universitet, Tekniska högskolan.
    Analysis of Research Methodologies of SPSs Full Papers from 2007 until 20112012Ingår i: Swedish Production Symposium, 2012 / [ed] Mats Björkman, 2012Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    Swedish production area has previously been defined and is still in need for some clarification. This paper gives an overview and draws conclusions about trends of aspects like number of authors, type of research methodology used, and research topics presented in the former SPS:s conferences. The aim of the paper is to describe practical phenomena using data from the 254 papers and the methodology used is statistical sampling. The empirical results show that there are mainly two research methodologies that dominate during the years of the conference, namely experimental design and case study. Thus, the research approach empirical research dominates the conference.

  • 340.
    Lindström, Veronica
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktionsekonomi. Linköpings universitet, Tekniska fakulteten.
    Linkages between attributes of SME:s and manufacturing performance measures2018Ingår i: Preprints of 20th International Working Seminar on Production Economics / [ed] Grubbström, Hinterhuber and Lundquist, Linköping, 2018, Vol. 3, s. 285-296Konferensbidrag (Refereegranskat)
    Abstract [en]

    In the strategic planning of manufacturing, companies should assess their competitive advantage with the means of performance measures (PMs) and achieve a consistency with the decision making. The literature on PMs shows that there are mainly two views of PM development. The first view is the PM diversity view which highlights the importance of using a wide set of PMs. The other view is PM alignment, which advocates the alignment between PMs and manufacturing strategy. Although the rich literature on PMs, research on PMs in Small- and Medium sized enterprises (SMEs) is limited but shows that the use of PMs in SMEs is typically financially focused, informal, and unstructured. The use of this approach in SMEs is likely to hinder the achievement of strategic objectives. This paper contributes to the research of PMs in manufacturing SMEs by analysing the relationships between the use of PMs and certain attributes of the SME. The used approach is multiple case study for exploring linkages between PM diversity and alignment with the manufacturing strategy and firm context. The data collection of each SME includes several strategic manufacturing attributes such as type of production system, manufacturing capabilities, and no. of PMs and specific measurements. The findings indicate a strong relationship between PM diversity and firm turnover, whereas the relationship seems weak between PM diversity and manufacturing capability. Furthermore, the relationship between PM alignment and competitive priorities indicate no alignment for SMEs, whereas the alignment between production system and competitive priorities seems to be stronger.

  • 341.
    Lindström, Veronica
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktionsekonomi. Linköpings universitet, Tekniska högskolan.
    Habib, Sinan
    Torstensson, Simon
    A modified work process for manufacturing strategy formulation: A case study of a small industrial company in Sweden2014Ingår i: Proceedings of the 6th International Swedish Production Symposium 2014, 2014Konferensbidrag (Refereegranskat)
    Abstract [en]

    Manufacturing is a crucial part to organisational success in an industrial SME, and therefore manufacturing strategy formulation is of great importance for small businesses. Recent research suggests that there is a need to adapt frameworks and procedures for manufacturing strategy formulation to small- and medium sized companies. This study describes a modified work process, which was also tested for formulation of manufacturing strategy formulation in a small industrial company in Sweden.

  • 342.
    Lindström, Veronica
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktionsekonomi. Linköpings universitet, Tekniska fakulteten.
    Jansson, Theodor
    Linköpings universitet, Tekniska fakulteten.
    Lennartsson, Henrik
    Linköpings universitet, Tekniska fakulteten.
    Linking digitalization to manufacturing strategy: a case study at Scania CV AB in Oskarshamn2019Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    To sustain competitiveness in the automotive industry, industrial companies seek new ways of increasing and improving efficiency and flexibility of their production systems. By embracing the shift towards smart factories, industrial companies need to consider both short term and long-term investments. When implementing digitalized solutions, automotive factories need to understand what initiatives that need to be made, and when. This case study is done at Scania CV AB in Oskarshamn, and more specifically in the logistics department inside the main assembly. As Scania forecasts a growing demand of their products, the company needs to increase their internal delivery capacity and requires an improved product and process quality on a long-term basis using digital technology. Based on this problem, the purpose of this study is to analyse how digitalization will affect the current manufacturing strategy and how digitalization may improve the current manufacturing strategy. The results of the case study show that Scania CV AB in Oskarshamn should start to implement digitalization by introducing compatible technologies and by changing their organization structure. A roadmap is presented suggesting short-term and long-term objectives that links digitalization to manufacturing strategy of the case study. 

  • 343.
    Lindström, Veronica
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktionsekonomi. Linköpings universitet, Tekniska fakulteten.
    Persson, Fredrik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktionsekonomi. Linköpings universitet, Tekniska fakulteten.
    Viswanathan, Arun Pravin Chennai
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling. Linköpings universitet, Tekniska fakulteten.
    Rajendran, Mahendran
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling. Linköpings universitet, Tekniska fakulteten.
    Data quality issues in production planning and control – Linkages to smart PPC2023Ingår i: Computers in industry (Print), ISSN 0166-3615, E-ISSN 1872-6194, Vol. 147, artikel-id 103871Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In the era of Industry 4.0 and digitalization, planning solutions need to co-exist with each other and be able to manage higher complexity and with a higher performance. As the concept smart production planning and control is a part of industry 4.0, it is highly relevant to study and is in this paper explored on the four elements of smart PPC (real-time data management, dynamic production planning and re-planning, autonomous production control, and continuous learning). This paper provides a framework for linking the four elements of smart PPC with data quality issues in state-of-the-art production planning and control environments. Maintaining a high standard of data quality in the business processes aids the organization to stay competitive in its market. Hence, our assumption is that a high level of data quality is needed in production planning and control for a high-performance outcome. The empirical part of our study results in a bar-chart of seven data quality problems and their occurrences together with their causes in PPC. According to the empirical data results, inaccurate data entries is the most common data quality problem related to PPC. The causes of the inaccurate data entries can be linked to human resources and organizational control. Future research should strengthen the validity of the proposed linkages between data quality problems and elements of smart PPC and implications on strategic, tactical, and operational planning levels.

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  • 344.
    Lindwall, Carl
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell marknadsföring och industriell ekonomi.
    Larsson, Martin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell marknadsföring och industriell ekonomi.
    Topics on Branding: Exploring the Brand Construct and its Linkages to Risk, Value and Trust in a Business-to-Business Context2010Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    In this thesis, the brand construct and its connections to risk, value and trust are explored in a Business-to-Business context.

    The different characteristics of B2B and B2C marketing is elaborated upon and coupled with brand management strategies viable in the respective markets.

    Contemporary academic theory on the explored constructs is discussed, and an attempt at conceptually visualizing their suggested linkages is presented.

    Based on the theoretical findings, a qualitative study is conducted by means of interviews with brand managers and marketing executives with the aim of establishing how Swedish industrial multinational companies employ brand strategies in their market communication, and to what extent the constructs explored are communicated as a part of their brand message.

    We find empirical evidence that risk, value and trust indeed are important in the brand communication of industrial companies. However, the relative importance of these constructs is found to be highly dependent on a multitude of both internal and external factors, such as the complexity of the offering, the degree of competition in the marketplace, and the amount of required customer interaction. Trust seems to be the construct most commonly incorporated in the branding activities, and value is not as actively stressed as conjectured.

    The corporate brand appears to be the most important in new tasks, where previous experiences of interaction with the seller is deemed more important in modified and straight re-buys.

    Similar to consumer marketing, the main merit of having a strong brand equity is the ability to charge price premiums, along with often making the short list of potential suppliers in the customers’ procurement processes. However, many industrial companies do not actively employ brand strategies and dedicated brand managers are not commonplace. Further, it cannot be decisively concluded that a strong brand focus is important for all industrial companies and in all markets. Again, external market characteristics, together with internal organizational conditions need to be taken into account.

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    FULLTEXT02
  • 345.
    Lingegård, Sofia
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska högskolan.
    Lindahl, Mattias
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska högskolan.
    Integrated Product Service Offerings for rail infrastructure: benefits and challenges regarding knowledge transfer and cultural change in a Swedish case2015Ingår i: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 98, s. 166-174Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The aim of this paper is to investigate potential benefits and challenges regarding knowledge transfer and cultural change from the provider and buyer perspectives when using IPSOs for Swedish rail infrastructure. Considering material use and the importance of availability of the tracks makes rail infrastructure an interesting candidate for a business model based on a life-cycle approach, which can result in a reduction in cost and environmental impact.

    The concept of the Integrated Product Service Offering (IPSO) has in several business areas proven to be a means with potential to reduce the environmental impact of products and services, increase cost efficiency and quality, and act as a driver for change. The business model, which is based on a life-cycle approach, focuses on the function instead of the initial price of the product.

    Among the main findings are the lack of information and knowledge transfer that act as a barrier for innovation, and that the buyer's conservative business culture makes it difficult to implement new types of contracts. Since IPSO contracts require improved information transfer, they could potentially stimulate innovation as well as processes for evaluation of the contracts. By involving the contractors in the design phase their knowledge could be used in a better way, creating a feedback loop from practice to design.

    The empirical part, focusing on the rail infrastructure industry in Sweden, has been collected using individual interviews and a group interview approach.

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  • 346.
    Lingegård, Sofia
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling.
    Sandström, Emma
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling.
    Dressed for Success: A study of Success Factors For Small and Medium-sized Manufacturing Enterprises in Sweden2008Självständigt arbete på avancerad nivå (magisterexamen), 20 poäng / 30 hpStudentuppsats
    Abstract [en]

    The business climate of today, with increasing globalization, has resulted in structural changes in the commercial and industrial sectors. As a result, many large companies have moved their production abroad. Therefore the smaller companies have become increasingly important for growth and employment nationally. Small businesses are a significant contributor to the well-being of nations and small and medium-sized enterprises (SMEs) play an important role for Sweden, both in terms of economic contribution and employment.

    Success has been discussed and investigated for a long period of time and the question is how it should be defined and measured. Many theories have been produced including different definitions and research methods. For this thesis, however, success is defined as the growth and financial performance of a firm measured in volume growth, relative change in net turnover, and value growth, relative change in equity. As a side condition, profit margins must be positive for a company to be classified as successful. This thesis hence aims to determine which factors influence the success of small and medium-sized enterprises in Sweden and how they influence the success of these enterprises.

    Eleven manufacturing SMEs, seven successful and four unsuccessful, were investigated and analyzed separately and then compared with one another in an attempt to determine which specific factors contributed to their respective performance. The four unsuccessful companies were included in the investigation for comparison to be able to identify the specific factors for successful companies. The analyses resulted in the following areas: Organization, Vision and Strategy, Characteristics of the CEO, Core Competences, Recruiting, Product Development and Innovations and Market. Among these factors Vision and Strategy, Core Competences and Customer Interaction were identified as the factors that have the greatest impact on success. Additionally, two clear relations between factors could be determined, i.e. between Clear vision and strategy and Defined culture as well as a relation between Flexibility and Customer Interaction.

    The conclusions are generalizable to all manufacturing SMEs in Sweden since the sample selection is representative for the target population. Furthermore, the success factors could be applied to companies abroad as well if the business climate and the conditions are similar. Whether the factors can be applied to firms that act within different SNI-codes (Swedish Standard Industrial Classification) besides manufacturing is yet to be proved.

    For further research we suggest a deeper investigation, where the information is obtained from more than one sources within the company. Also, the external networks of the company could be of interest to interview. Other aspects to investigate further would be potential differences between small and medium-sized firms and whether or not the results are applicable for other industries.

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  • 347.
    Liu, Chengxi
    et al.
    VTI Swedish Natl Rd & Transport Res Inst, Sweden.
    Tapani, Andreas
    VTI Swedish Natl Rd & Transport Res Inst, Sweden.
    Kristoffersson, Ida
    VTI Swedish Natl Rd & Transport Res Inst, Sweden.
    Rydergren, Clas
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Kommunikations- och transportsystem. Linköpings universitet, Tekniska fakulteten.
    Jonsson, Daniel
    KTH Royal Inst Technol, Sweden.
    Appraisal of cycling infrastructure investments using a transport model with focus on cycling2021Ingår i: Case Studies on Transport Policy, ISSN 2213-624X, E-ISSN 2213-6258, Vol. 9, nr 1, s. 125-136Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Cost-benefit analysis (CBA) for cycling infrastructure investments are less sophistically developed compared to the ones for private cars and public transport, and one of main reasons is the lack of "well-developed" transport models for cycling. In this study, a dedicated transport model for cycling is used to appraise cycling infrastructure investments in Stockholm, Sweden. The model captures the impact of a change in cycling infrastructure on cycling route choice, mode choice, destination choice and trip generation and calculates cycling flow on link level. the generalised cost measure defined in the route choice model captures the impact of cycling infrastructure. Results suggest that although cycling flow on the links with investment may increase substantially, only a small share comes from modal shift and thus the external effects such as reducing car congestion and emissions are marginal. For all three scenarios investigated, over 97% of the benefits measured in the unit of generalised cost belong to the existing cyclists. The route choice model does not minimize travel time but generalised cost which also measures health, safety benefits and other possible benefits that may be considered by the cyclists when they choose to cycle. In fact, travel time saving benefits of the investments evaluated in this paper are all negative. The existing effect evaluation models therefore need to be adjusted to be more consistent with the transport model.

  • 348.
    Liu, Weihua
    et al.
    Tianjin Univ, Peoples R China.
    Liang, Yanjie
    Tianjin Univ, Peoples R China.
    Tang, Ou
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktionsekonomi. Linköpings universitet, Tekniska fakulteten.
    Ma, Xin
    Monash Univ, Australia.
    Channel competition and collaboration in the presence of hybrid2022Ingår i: Transportation Research Part E: Logistics and Transportation Review, ISSN 1366-5545, E-ISSN 1878-5794, Vol. 160, artikel-id 102658Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper studies the channel choice problem in an e-retailing market when a reseller and an agency seller are experimenting with a new format, i.e., a hybrid retailing strategy. Under this strategy, the reseller not only sells products to consumers directly, but also expands the market in collaboration with the agency seller who operates a platform. However, the motivation and effectiveness of this strategy are not clear. Therefore, we develop game-theoretic models to investigate retail and wholesale prices, and the equilibrium channel choice. First, we find that the hybrid retailing strategy results in a higher retail price for the reseller; in contrast, the agency seller prefers to reduce the retail price when the fraction of market demand through the hybrid retailing channel is large. Second, we find that the hybrid retailing strategy can benefit all stakeholders when the fraction of market demand through the hybrid retailing channel is small. Third, under a dual retailing channel with price competition, a reseller and an agency seller are still willing to collaborate through a hybrid retailing strategy, because the cost of market expansion caused by this strategy is partly transferred to the manufacturer. Our results can provide meaningful decision support and operational rules for stakeholders to make strategic retail decisions.

  • 349.
    Liu, Weihua
    et al.
    Tianjin Univ, Peoples R China.
    Liang, Yanjie
    Tianjin Univ, Peoples R China.
    Tang, Ou
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktionsekonomi. Linköpings universitet, Tekniska fakulteten.
    Shi, Victor
    Wilfrid Laurier Univ, Canada.
    Liu, Xinyun
    Tianjin Univ, Peoples R China.
    Cooperate or not? Strategic analysis of platform interactions considering market power and precision marketing2021Ingår i: Transportation Research Part E: Logistics and Transportation Review, ISSN 1366-5545, E-ISSN 1878-5794, Vol. 154, artikel-id 102479Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In order to increase market share and enhance business competitiveness, comprehensive retail platforms (CRPs), such as Taobao.com and JD.com, are currently cooperating with social service platforms (SSPs), such as TikTok and Meiyou. Therefore, more research attention needs to be paid to such platform supply chains. To this end, this study develops stylized models to explore the impacts of the market power of an SSP and the precision marketing of a CRP on platform cooperation. Our major research findings include the following. First, we investigate the equilibrium strategy and find that if the CRPs commission rate is low (high), cooperation becomes the equilibrium strategy when the SSPs market power is low (high). Second, in most cases, market power will affect the equilibrium strategy with a change in the commission rate. However, in a certain range of commission rates, the equilibrium strategy remains unchanged. That is, market power has an "invalidation effect" on the equilibrium strategy. Finally, we find that as the commission rate increases, precision marketing reduces the willingness of supply chain members to implement platform cooperation. However, when the commission rate is low, precision marketing stimulates cooperation between platforms. The study results provide guidelines for improving the cooperation between CRPs and SSPs.

  • 350.
    Liu, Yang
    Department of Production, University of Vaasa, Vaasa, Finland.
    Sustainable competitive advantage in turbulent business environments2013Ingår i: International Journal of Production Research, ISSN 0020-7543, E-ISSN 1366-588X, Vol. 51, nr 10, s. 2821-2841Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The future competitiveness of manufacturing operations under dynamic and complex business environments relies on forward-thinking strategies. The objective of this paper is to identify and develop the operational competitiveness in a sustainable manner by implementing a unique sustainable competitive advantage (SCA) for managing dynamic business situations. This paper develops a theoretical approach to integrating the core factors which affect operational competitiveness performance, that is to say manufacturing strategy and transformational leadership with technology level, into conceptual analytical models to evaluate overall competitiveness, and utilises sense and respond (S&R) for dynamic decision-making to optimise resource allocations and adjust strategies in order to develop competitiveness potential in a sustainable manner. From the empirical research, the adjustments in manufacturing strategy and transformation leadership by implementing SCA through fast strategy with proposed models are found to be effective and successful in managing turbulent business environments such as the economic crisis. Such proactive operations are proposed as the unique SCA with empirical research carried out in a global context, which provides both theoretical significance and also practical benefit to conclude the experience of managing operations in turbulent business environments.

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