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  • 151.
    Grahn, Sten
    Linköpings universitet, Institutionen för konstruktions- och produktionsteknik. Linköpings universitet, Tekniska högskolan.
    Modeling of Energy-Efficient Robots for Lightweight, High Volume Assembly: Concepts and Optimization2002Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    Commercial and environmental demands put constant pressure on robot manufacturers to improve the efficiency of the robots they produce. Satisfying answers to efficiency questions can have a major impact on both manufacturers and users.

    This thesis presents a study of energy-efficient robots with rigid links that meet the requirements of high speed and ability to work with lightweight objects at low cost. The Linköping Flywheel Robot (LFR), the prismatic variant (LFRp) of the Linköping Flywheel Robot and a spring-assisted gantry robot are described in detail and a pendulum robot is briefly mentioned.

    The first part of the thesis contains an introduction to the field of high-speed robots, a problem definition and a brief introduction to the robots presented and analyzed in the thesis. The second part presents the mechanical concept of the LFR, optimizations of the concept in terms of optimal link lengths and path planning. The optimizations for the LFR focus on minimizations of maximum torque of the outer links during operation. It is shown that the maximum torque during operation can be substantially reduced. The third part of the thesis presents the mechanical concept of the spring-assisted gantry robot. The optimizations of the gantry robot focus on optimization of spring constants and minimization of motor work during operation, and it is shown that the necessary work can be considerably reduced. Four appendixes are included in the thesis: an analysis of an LFR robot with only revolute joints (Appendix A), a description of the mechanical design, the electronics and the control of a prismatic prototype variant of the LFR (LFRp) (Appendix B), an overview of the Newton-Euler equations (Appendix C) and six internationally published papers on which the thesis is built up (Appendix D). The results should be of interest in contexts such as the food industry, which typically handles lightweight objects in large volumes.

    Delarbeten
    1. Spring-assisted gantry robots versus conventional gantry robots: spring constant optimization and work minimization
    Öppna denna publikation i ny flik eller fönster >>Spring-assisted gantry robots versus conventional gantry robots: spring constant optimization and work minimization
    2002 (Engelska)Ingår i: Industrial robot, ISSN 0143-991X, E-ISSN 1758-5791, Vol. 29, nr 1, s. 53-60Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    The spring-assisted gantry robots, described in this paper, were designed primarily for the rapid transfer of lightweight objects from one point to another, e.g. to pick objects from a conveyor belt and to place them in a box. The average amount of work required for pick-and-place operations carried out by a conventional gantry robot was decided. Springs were added to conserve the kinetic energy of the main bar, which slides in the X-direction and the work of the same pick-and-place operation was decided. A theoretical study showed that when the spring constant was optimized the required motor work of the spring-assisted robots were 42-95 percent less than the required work of the conventional robot. The conceptual robot exists in mathematical models in Matlab and SIMULINK.

    Nyckelord
    robots; mechanics; high speed
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-53558 (URN)10.1108/01439910110410060 (DOI)
    Tillgänglig från: 2010-01-25 Skapad: 2010-01-25 Senast uppdaterad: 2021-10-06
  • 152.
    Grahn, Sten
    et al.
    Swerea IVF AB, Sweden; Mälardalen University (MDH), Sweden.
    Gopinath, Varun
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Wang, Xi, Vincent
    KTH, Royal Institute of Technology, Stockholm 11428, Sweden.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Exploring a Model for Production System Design to Utilize Large Robots in Human-Robot Collaborative Assembly Cells2018Ingår i: Procedia Manufacturing, E-ISSN 2351-9789, Vol. 25, s. 8s. 612-619Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    It has been shown that large robots can be safely installed for human-robot collaborative assembly cells in experimental setups. It has also been found that these installations require demanding considerations of a significant number of layout and safety parameters. This indicates that successful commercial implementations will require a resource efficient model for production system design that anticipates utilization of large robots in collaborative settings. Experiences from experimental setups have been used to explore a basic model for such production system design, to stimulate a discussion regarding what model characteristics should be tested and validated in future research.

    Ladda ner fulltext (pdf)
    fulltext
  • 153.
    Granasen, Dennis
    Linköpings universitet, Institutionen för datavetenskap. Linköpings universitet, Tekniska fakulteten. Swedish Def Res Agcy, Sweden.
    Towards automated assessment of team performance by mimicking expert observers ratings2019Ingår i: Cognition, Technology & Work, ISSN 1435-5558, E-ISSN 1435-5566, Vol. 21, nr 2, s. 253-274Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Automation is the holy grail of performance assessment. Cheap and reliable automated systems that produce consistent feedback on performance. Many such systems have been proposed that accurately measure the state of a product or the outcome of a process. Procedural faults can be detected and even mitigated without the need for human interference. In production industry and professional sports, this is a natural part of business. However, in macrocognitive team performance studies, human appraisal is still king. This study investigates the reliability of human observers as assessors of performance among virtual teams, and what they base their assessments on when only able to monitor one of the team members at a time. The results show that expert observers put a lot of emphasis on task outcomes and on communication and are generally reliable raters of team performance, but there are several aspects that they cannot rate reliably under these circumstances, e.g., team workload, stress, and collaborative problem-solving. Through simple algorithms, this study shows that by capturing task scores and different quantitative communication metrics, team performance ratings can be estimated to closely match how the expert observers assess team performance in a virtual team setting. The implication of the study is that numeric team performance estimations can be acquired by automated systems, with reasonable accuracy and reliability compared to observer ratings.

  • 154.
    Granath, Jon
    et al.
    Uppsala Universitet - STS.
    Svedlund, Björn
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktionsekonomi.
    Wiberg, Malin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktionsekonomi.
    Scanias Produktionssystem - inte bara för produktion: En implementering av Scanias Produktionssystem inom teknikorganisationen vid Scania Chassi2009Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats
    Abstract [sv]

    Föreliggande rapport är resultatet av ett examensarbete vid Linköpings tekniska högskola och Uppsala universitet utfört på uppdrag av Chassimonteringen vid Scania CV AB i Södertälje.

     

    Scania har sedan början av nittiotalet haft ett nära samarbete med Toyota ur vilket bland annat filosofin Scanias Produktionssystem (SPS) har utvecklats, som beskriver Scanias värderingar, principer och prioriteringar. SPS anses vara en av Scanias konkurrensfördelar och har visat sig öka effektiviteten och produktiviteten i produktionen, dit monteringsverksamheten vid Chassi inkluderas. Teknikorganisationen (MST) har som uppgift att stötta monteringsverksamheten och tror att en implementering av SPS kan hjälpa även dem att effektiviseras och skapa en mer homogen organisation.

     

    Syftet med examensarbetet är att påbörja en implementering av SPS inom MST genom varsitt pilotprojekt för produkt- respektive processteknikerna. SPS-principen Normalläge - Standardiserat arbetssätt ska implementeras inom varsin arbetsuppgift för respektive teknikergrupp och speciellt fokus ska läggas på underprinciperna Standardisering, Takt och Balanserat flöde.

     

    En lyckad implementering av SPS inom teknikernas arbete krävde en förankring bland teknikerna för att skapa en egen vilja hos dem att förändra sitt arbetssätt. Detta uppnåddes genom att vid ett seminarium förklara examensarbetets syfte och fördelar med att arbeta enligt SPS samt genom att engagera teknikerna så mycket som möjligt under implementeringens gång. Exempelvis valde teknikerna själva ut inom vilken arbetsuppgift SPS skulle implementeras, skrev sina egna standarder och förbättrade det nya arbetssättet när problem uppstod. Examensarbetet skapade även förbättringsgruppmöten, vilka fungerade som ett forum för teknikerna att ta upp och genomföra förbättringsförslag.

     

    Examensarbetet uppfyllde sitt syfte då varsitt pilotprojekt för produkt- respektive processteknikerna påbörjade en implementering av SPS inom MST och underprinciperna till Normalläge - Standardiserat arbetssätt implementerades inom de utvalda arbetsuppgifterna. Speciellt fokus lades på underprinciperna Standardisering, Takt och Balanserat flöde. Det kunde även konstateras att förbättringar hade skett för de två utvalda arbetsuppgifterna då dels de inom examensarbetet utförda mätningarna visade att teknikerna upplevde att deras arbete överensstämde mer med SPS efter implementeringen, dels det faktum att det nya arbetssättet uppfyllde alla principer och värderingar i SPS.

     

    Avslutningsvis kan det, utifrån examensarbetet, konstateras att det finns möjlighet att implementera SPS inom nästan alla arbetsuppgifter för en tekniker och därmed finns det goda förutsättningar för Scania Chassi att fortsätta implementera SPS inom MST.

     

    Ladda ner fulltext (pdf)
    FULLTEXT01
  • 155.
    Granath, Liselott
    Linköpings universitet, Institutionen för konstruktions- och produktionsteknik.
    Montering av isolering på vattentank2006Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats
    Abstract [sv]

    Ett problem som finns i dag på IVT industrier är monteringen av isoleringen på vattentankarna. När isoleringen skall monteras på tanken blir det väldigt högt, så man måste klättra på ställningen som tanken är monterad på. Detta ökar risken för arbetsskador, då man skulle kunna ramla ner. Det är även väldigt slitsamt för axlarna eftersom man måste jobba med armarna högt över huvudet. Vidare är det väldigt svårt att få dit isoleringen, detta gör att man får trycka ihop taket på isoleringen med sidorna på isoleringen, vilket är väldigt slitsamt för kroppen. Syftet med examensarbetet har varit att utforma en arbetsmetod som ger en bättre arbetsställning och att dessutom förbättra flödet genom lokalen.

    Rapporten är indelad i: problemgranskning, teoretiska lösningar, utvärdering av lösningarna och utforskning av redskap. Förslagen till varje lösning motiveras med för- och nackdelar. Därefter redovisas det alternativ som anses komma att fungera bäst på IVT industrier.

    Efter att ha undersökt olika lösningar på dessa problem har jag funnit att den bästa lösningen är att ha en separat monteringsstation för isoleringen efter det att tanken monterats på underdelen. Genom att använda en personlyft kan man montera isoleringen utan att behöva klättra på monteringsställningen. Kroppen får en bättre arbetsställning eftersom man slipper att jobba med armarna högt. Detta är vad som kommer att rekommenderas till IVT industrier AB. Genom att flytta upp monteringsstationerna och flytta teststationerna och påfyllning av köldmedlet till den högra väggen får man ett bättre flöde genom lokalen.

    Ladda ner fulltext (pdf)
    FULLTEXT01
  • 156.
    Granman, Tobias
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Kvalitetsteknik. Linköpings universitet, Tekniska högskolan.
    Helgosson, Magnus
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Kvalitetsteknik. Linköpings universitet, Tekniska högskolan.
    Succeeding in Supplier Development: A Qualitative Case Study of Scania CV AB Suppliers2013Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Purpose

    To investigate under which conditions SCD’s work with implementing a lean mindset and behaviour at key suppliers is successful. To help fulfilling the purpose this thesis aims to answer the question:

    What affects how the production unit of a Scania key supplier adopts a lean mindset and behaviour with focus on continuous improvements?

    Methodology

    An exploratory multiple case study with a qualitative data analysis and inductive approach. The cases consist of five Swedish first-tier suppliers to Scania CV AB, and a pilot case study conducted at Scania, Södertälje.

    Result

    The case study resulted in a categorisation of suppliers into three groups based on their characteristics and ability to adopt a lean mindset and behaviour:

    Group I:  Lack of direction, inconsistent management culture, no deeper understanding or interest in lean, no involvement or responsibility of operators in improvement work, a tendency to copy tools and methods given by external help directly into the organisation.

    Group II:  Strong sense of direction, strong management culture, a personal interest in lean and improvements, an “us and them” culture between managers and operators, and a strong sense to develop tools and working methods in-house and be very restrictive with applying external thoughts in the organisation.

    Group III: Clear long-term direction; primarily evident among managers, clear targets on an operational level to guide the rest of the organisation, a supportive management culture, an expectation on operators to perform improvement work, and openness to external help but a strong sense of filtering and adapting to the own organisation.

    Conclusion

    Our conclusion is that SCD is variously successful due to that the same approach has been used despite different needs of the suppliers. The recommendation is to analyse suppliers with tools provided in this research and adapt the development approach to specific supplier needs:

    Group I: No prioritisation of long-term development of this group.

    Group II: Provide guiding from experience to management team, focus workshop on operators and their nearest contact points.

    Group III: Provide possible solutions to specific problems.

    Ladda ner fulltext (pdf)
    Master Thesis LIU-IEI-TEK-A--12-01547--SE - Succeeding in supplier development
  • 157.
    Granåsen, Magdalena
    et al.
    Division for Information- and Aeronautical Systems, Swedish Defense Research Agency, Linköping, Sweden.
    Andersson, Dennis
    Division for Information- and Aeronautical Systems, Swedish Defense Research Agency, Linköping, Sweden.
    Measuring team effectiveness in cyber-defense exercises: A cross-disciplinary case study2016Ingår i: Cognition, Technology & Work, ISSN 1435-5558, E-ISSN 1435-5566, Vol. 18, nr 1, s. 121-143Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In 2010, IT-security experts from northern European governments and organizations gathered to conduct the first of a series of NATO-led cyber-defense exercises in a pilot attempt of training cyber defense. To gain knowledge on how to assess team effectiveness in cyber-defense exercises, this case study investigates the role of behavioral assessment techniques as a complement to task-based performance measurement. The collected data resulted in a massive data set including system logs, observer reports, and surveys. Six different methods were compared for feasibility in assessing the teams’ performance, including automated availability check, exploratory sequential data analysis, and network intrusion detection system attack analysis. In addition, observer reports and surveys were used to collect aspects relating to team structures and processes, aiming to discover whether these aspects can explain differences in effectiveness. The crossdisciplinary approach and multiple metrics create possibilities to study not only the performance-related outcome of the exercise, but also why this result is obtained. The main conclusions found are (1) a combination of technical performance measurements and behavioral assessment techniques are needed to assess team effectiveness, and (2) cyber situation awareness is required not only for the defending teams, but also for the observers and the game control.

    Ladda ner fulltext (pdf)
    Measuring team effectiveness in cyber-defense exercises: A cross-disciplinary case study
  • 158.
    Grenzfurtner, Wolfgang
    et al.
    Univ Nat Resources & Life Sci Vienna, Austria.
    Rudberg, Martin
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Kommunikations- och transportsystem. Linköpings universitet, Tekniska fakulteten.
    Loike, Kristina
    Univ Nat Resources & Life Sci Vienna, Austria.
    Mayrhofer, Richard
    Univ Nat Resources & Life Sci Vienna, Austria.
    Gronalt, Manfred
    Univ Nat Resources & Life Sci Vienna, Austria.
    Industrialized housebuilding business strategies and the design of performance management systems2023Ingår i: Production planning & control (Print), ISSN 0953-7287, E-ISSN 1366-5871, Vol. 34, nr 12, s. 1178-1191Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Performance management systems (PMS) are essential instruments for the evidence-based management of on-site production within the industrialized housebuilding (IHB) sector. The information required for more evidence-based decision-making is determined by the business strategies and should be reflected in the design of the PMS. The aim of this study is to clarify, report on and analyze the influence which different strategic orientations have on the PMS. For this purpose, a multiple case study was conducted within the IHB sector of Austria, Germany and Switzerland. The findings revealed those business strategies which led companies to develop specific features within their PMS and showed which specific indicators are relevant for managing on-site performance. In addition, the findings identify weaknesses in performance measurement but also best practice examples. Based on the findings, a differentiated approach towards the ongoing refinement of PMS is suggested, allowing management to be more focussed on strategic objectives.

    Ladda ner fulltext (pdf)
    fulltext
  • 159.
    Grubbström, Robert W.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktionsekonomi. Linköpings universitet, Filosofiska fakulteten. Linköpings universitet, Tekniska fakulteten.
    Incorporating non-empty initial states into MRP Theory2022Ingår i: International Journal of Production Research, ISSN 0020-7543, E-ISSN 1366-588X, Vol. 60, nr 24, s. 7281-7300Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    MRP theory is a theoretical body treating production-inventory systems, in which produced items are made up of sets of produced or purchased sub-items, required to be available a lead-time before each product is completed. The hierarchical dependence between items is captured using input matrices from input-output-analysis, the necessary advanced timing by employing Laplace transform methodology, and the economic consequences by applying the net present value. Little attention has hitherto been given to aspects of a non-empty initial state, e.g. an initial inventory position. Since such states are common in industry, there is a strong need for this theory to include such aspects, in order to gain further practical acceptance. In this paper, theoretical consequences from having a non-empty initial state are investigated. A method for finding the Lot-for-Lot solution is developed using the concept of a truncated monotonically non-decreasing time function, generalising the approach of the generalised Leontief inverse and instrumental for designing plans meeting the necessary inner-corner requirement for optimality. Also the definition of inventory-related costs needs a modification for this concept to be consistent with NPV. These findings are applied in an extensive numerical example. Immediate future research concerns investigating principles for the optimal removal of initial backlogs.

  • 160.
    Grubbström, Robert W.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktionsekonomi. Linköpings universitet, Tekniska högskolan.
    The Newsboy problem when customer demand is a compound renewal process2010Ingår i: European Journal of Operational Research, ISSN 0377-2217, E-ISSN 1872-6860, Vol. 203, nr 1, s. 134-142Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The Newsboy (Newsvendor) problem is probably the simplest of all stochastic inventory problems, involving a one-time purchase decision and a stochastic sales outcome. As an investment, it can be interpreted as the simplest stochastic version of the point-in, point-out investment problem of Jevons [Jevons, W.S., Theory of Political Economy, Macmillan, London 1871].

    This paper provides a compound variation of the Newsboy problem. Instead of demand simply being known as to its distribution, here demand is generated by customers arriving at different points in time requiring amounts of varying size. Arrivals follow a renewal process, and amounts required are each taken from a second independent distribution.

    It is shown how the optimal purchase quantity in explicit form depends on properties of the two distributions, maximising the expected net present value (NPV) of the payments involved. The solution to the compound problem will be the solution to the classical problem, if designing a special distribution for the demand process.

    The developments make use of the relation between the NPV and the Laplace transform, simultaneously using the Laplace transform as a moment-generating function.

  • 161.
    Gu, Xinli
    Linköpings universitet, Institutionen för datavetenskap. Linköpings universitet, Tekniska högskolan.
    Testability analysis and improvement in high-level synthesis systems1992Licentiatavhandling, monografi (Övrigt vetenskapligt)
    Abstract [en]

    With the level of integration existing today in VLSI technology, the cost of testing a digital circuit has become a very significant part of a product. This cost mainly comes from the test pattern generation (ATPG) for a design and the test execution for each product. Therefore it is worthwhile to detect parts of a design which are difficult for ATPG and test execution, and improve these parts before using ATPG and testing.

    There are existing methods of improving the testability of a design, such as the scan path technique. However, due to the high cost of introducing scan registers for all registers in a design and the delay caused by long scan paths, these approaches are not very efficient. In this thesis, we propose a method which only selects parts of a design to be transformed based on the testability analysis. For this purpose, we

    1. define a testability measurement which is able to predict the costs to be spent during the whole test procedure.
    2. evaluate the result of the testability measurement, and based on this evaluation develop some strategies to identify difficult-to-test parts in a design.
    3. create a class of testability improvement transformations and apply them to the difficult-to-test parts identified.
    4. recalculate testability for the design with part of it transformed.

    These procedures are repeated until design criteria are satisfied. The implementation result conforms to our direct observation. For test examples discussed in the thesis, we find the best improvement of testability within the other design constraint.

  • 162.
    Gunderyd, Sofia
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Logistik- och kvalitetsutveckling.
    Johander, Frida
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Logistik- och kvalitetsutveckling.
    En effektivare intern materialförsörjning av materialbrister: En fallstudie på Saab Surveillance2022Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Intern materialförsörjning ställer höga krav på leveransservice, exempelvis i form av leverans av rätt material i rätt kvantitet och kvalitet. En del av den interna materialförsörjningen på Saab Surveillance, ett företag som tillverkar högspecialiserade och avancerade produkter, består av materialbrister. Det finns höga krav på effektiv hantering av materialbrister med avseende på tid såväl som flexibilitet, som i nuläget inte uppfyller produktionens behov. 

    För att undersöka möjligheten att öka effektiviteten i logistikflöden med hjälp av kvalitetskoncept, genomfördes en fallstudie på Saab Surveillance. Studiens syfte var att utveckla en förbättrad hantering av materialbrister hos Saab Surveillance som bidrar till en effektivare intern materialförsörjning från lager till produktion genom tillämpning av kvalitetskoncept. För att uppnå studiens syfte besvarades tre frågeställningar. Den första frågeställningen, ”Hur är den interna materialförsörjningen av materialbrister utformad i nuläget?”, besvarades genom kvalitativa data från intervjuer och observationer. Därutöver bidrog kvantitativa data med ytterligare information, exempelvis ledtider och orsaker till materialbrister. Därefter analyserades den nuvarande interna materialförsörjningen av materialbrister utifrån olika teman och statistisk processtyrning för att besvara andra frågeställningen, ”Vilka möjligheter finns för effektivisering av den interna materialförsörjningen av materialbrister?”. Den tredje frågeställningen, ”Hur bör den interna materialförsörjningen av materialbrister hanteras för att öka effektiviteten?”, besvarades utifrån resultatet från den första och andra frågeställningen, referensramen samt intern benchmarking. 

    Studiens resultat visade att den nuvarande interna materialförsörjningen av materialbrister kan sammanfattas med sju övergripande aktiviteter: registrering i materialbeställningslista, uppdatering i affärssystemet, skicka information, prioritering av plockning, plockning, leverans och mottagning. Vidare identifierades flera möjligheter för ökad effektivitet i material- och informationsflödet. Till exempel fanns variation i ledtid, slöseri i form av väntetid samt bristande kommunikation. Möjligheterna för ökad effektivitet utgjorde grunden för förbättringsförslagen. 

    Samtliga sju förbättringsförslag utgick från produktionens behov och förväntningar. Förbättringsförslagen bestod till exempel av att införa en produktionsbuffert för att reducera antalet materialbrister som hanteras i lagret. Genom att skapa förståelse för produktionens förväntningar och lagrets förutsättningar kan det interna kundfokuset öka samt bidra till att en förväntad ledtid för leverans av materialbrister bestäms. Vidare kan införandet av ett materialbristverktyg för beställning av materialbrister standardisera kommunikationen mellan produktionen och lagret. Dessutom var ett förbättringsförslag att tillämpa sekventiell zonplockning av materialbrister för att undvika väntetid som uppstår vid konsolidering. Effektivare leveranser av materialbrister kan också uppnås genom att ha fasta tider för mjölkrundor samt ta bort leveransalternativet till upphämtningshyllan. Ytterligare förbättringsförslag syftade till att reducera väntetid genom omfördelning av ansvar, där montören tillåts beställa materialbrister och senare hämta det från en bestämd plats för materialbrister, istället för produktionsplaneraren. Avslutningsvis resulterade studien i ett förbättringsförslag om att tillämpa statistisk processtyrning för att kunna följa upp effekterna av de föreslagna förbättringarna. 

    Slutligen visade studien att tillämpning av kvalitetskoncept som kundfokus och statistisk processtyrning kan bidra till effektivisering av intern materialförsörjning av materialbrister. Vidare kan det också vara intressant att undersöka möjligheten att tillämpa kvalitetskoncept i andra logistikflöden för att uppnå ökad effektivitet. 

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  • 163.
    Gunnarsson, Linus
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Monteringsteknik.
    Bitar, Nadim
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Monteringsteknik.
    Assembly Analysis - Fixed Leading Edge for Airbus A3202010Självständigt arbete på grundnivå (högskoleexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    The objective with this thesis project was to with the simulations software Delmia make a working build philosophy for the new concept of the fixed leading edge for the Airbus A320 airliner, but also to make two conceptual fixtures in the modular framework BoxJoint for pre-drilling of two sub assemblies.

     

    Everything started with a study in Delmia to both recap on previous knowledge and to learn more about it. This was followed by early simulations on the new concepts that were provided by project partners. Then a study was made in the Affordable Reconfigurable tooling, ART-concept. A suggested build philosophy was created and possible areas for automation were identified. These areas were all the drilling and fettling operations except the drilling in the last stage where the pre-drilled holes are opened up. More investigations needs to be done to see if a robot can install and remove slave pins that are used in the last stage. Two conceptual designs on fixtures were created where one uses two industrial robots with vision systems to get the correct accuracy when drilling the product. The other was build to be able to use a Tau-Gantry robot solution together with a vision system.

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  • 164.
    Gustafsson, Carolina
    et al.
    Linköpings universitet, Institutionen för konstruktions- och produktionsteknik.
    Mekic, Slavisa
    Linköpings universitet, Institutionen för konstruktions- och produktionsteknik.
    Flexibel mätcell inom flygplansmontering2005Studentuppsats
    Abstract [sv]

    Saab Aerostructures i Linköping utvecklar och tillverkar flygplansstrukturer. Innan dessa levereras till kund ska de verifieras genom en slutkontroll och vid tiden för denna studie utförs slutkontrollen bland annat i kontrolljiggar. Dessa kontrolljiggar är produkt-specifika och mycket kostsamma att tillverka och underhålla.

    Denna studie behandlar möjligheterna med att införa en mätcell, med tillhörande mät-system, istället för att använda kontrolljiggar för att utföra slutkontrollen. Vid detta införande skulle flera vinster kunna göras. En uppskattning har gjorts av vad det skulle kosta att använda sig av kontrolljiggar i två kommande projekt på företaget och detta har sedan satts i relation till kostnaderna med att investera i ett mätsystem. Vid en sådan investering kan flera intäkter väntas, men dessvärre har dessa övriga intäkter inte kunnat värderats i denna studie. Bland dessa intäkter kan nämnas att fler produkter skulle bli godkända direkt och produktionen underlättas, genom att produktens hela tolerans kan utnyttjas. Med de undersökta mätsystemen kan flexibilitet och mobilitet erhållas till skillnad mot användning av de produktspecifika och fasta kontrolljiggarna. Kontroll- och analysarbetet skulle minska och många förtjänster fås då all mätdata behandlas i datormiljö.

    Vid en eventuell investering i ett nytt mätsystem, rekommenderas en lasertracker med T-Scan från Leica Geosystems. Detta gäller om investeringen kan visas vara lönsam med övriga intäkter inräknade. En beräkning har gjorts som visar att om de övriga intäkterna årligen uppgår till 300 000 SEK, är investeringen återbetald efter tre år.

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  • 165. Beställ onlineKöp publikationen >>
    Gustafsson, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Exploring Data-Driven Methods to Enhance Usability of Design Optimization2022Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    Developing high-performing products at a low cost while keeping development time down is increasingly important in today’s competitive market. The current state presents a need for efficient product development processes. One of the challenges is knowledge often being limited in early stages where the cost of making changes is still relatively low. As the process progresses more knowledge is gained to better support decisions; however the cost of making changes increases, limiting the design freedom. To increase knowledge while retaining design freedom, several computer-based tools are available to both generate and evaluate designs in order to make iterations faster and more accurate.

    Design Optimization (DO) can be utilized to explore the design space and find optimal designs. A Computer-Aided Design (CAD) model is often required as input to analysis tools evaluating the designs. By utilizing Design Automation (DA) several tasks involved in creation and modification of CAD models can be automated. For this reason, DA is sometimes considered an enabler for DO although its use is far wider, covering several aspects of the design process mainly focusing on automating repetitive and routine tasks.

    Machine Learning and other data-driven methods are becoming increasingly viable in the context of DO and DA. This thesis explores the use of data-driven methods to enhance the usability of DO in different ways such as a faster process, new use-cases, or a more integrated and automated process.  

    Literature in the area is reviewed, identifying applications, trends and challenges. Furthermore, two support tools are developed, incorporating data-driven methods tied to an industrial case. The applications focus on parameterizing geometry and predicting design performance respectively. Potential benefits, limitations, and challenges are discussed based on the literature review and insights from the two support tools. The focus of the thesis is mainly on how data-driven methods can facilitate automation and integration in the design process, specifically for complex products requiring significant engineering efforts.  

    Delarbeten
    1. Comparison of Design Automation and Machine Learning algorithms for creation of easily modifiable splines
    Öppna denna publikation i ny flik eller fönster >>Comparison of Design Automation and Machine Learning algorithms for creation of easily modifiable splines
    2020 (Engelska)Ingår i: Proceedings of NordDesign 2020, Lyngby, Denmark, 12th - 14th August 2020 / [ed] Mortensen, N.H.; Hansen, C.T. and Deininger, M., The Design Society, 2020Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    In order to enable easy modification of results from a design optimization process in a CAD tool, a flexible representation of the geometry is needed. This is not always trivial however, since many file formats are not importable as modifiable geometry into the CAD tool, and if they are, they might not represent the geometry in a way that enables easy modification. To mitigate this problem a design automation (DA) and a machine learning (ML) approach are developed and compared using a test case from an optimization process used to optimize hose routing in tight spaces. In the test case used, the geometry from the optimization process consists of center curves represented as a large number of points. To enable easy modification a more flexible representation is needed such as a spline with a few well-placed control points. Both the DA and ML approach can approximate center curves from the optimization process as splines containing a varying number of control points but do show different properties. The DA approach is considerably slower than the ML but adds a lot of flexibility regarding accuracy and the number of control points used.

    Ort, förlag, år, upplaga, sidor
    The Design Society, 2020
    Serie
    DS ; 101
    Nyckelord
    Design Automation, Machine Learning, Computer aided Design, Optimization
    Nationell ämneskategori
    Maskinteknik
    Identifikatorer
    urn:nbn:se:liu:diva-184173 (URN)10.35199/NORDDESIGN2020.55 (DOI)9781912254088 (ISBN)
    Konferens
    NordDesign
    Tillgänglig från: 2022-04-06 Skapad: 2022-04-06 Senast uppdaterad: 2022-04-07
    2. Combinatorial Optimization of Pre-Formed Hose Assemblies
    Öppna denna publikation i ny flik eller fönster >>Combinatorial Optimization of Pre-Formed Hose Assemblies
    2021 (Engelska)Ingår i: Proceedings of the ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference (IDETC-CIE2021): Volume 3B: 47th Design Automation Conference (DAC), The American Society of Mechanical Engineers , 2021, artikel-id V03BT03A033Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    Cable and hose routing is a complex and time-consuming process that often involves several conflicting objectives. Complexity increases further when routes of multiple components are to be considered through the same space. Extensive work has been done in the area of automatic routing where few proposals optimize multiple hoses together. This paper proposes a framework for the routing of multiple pre-formed hoses in an assembly using a unique permutation process where several alternatives for each hose are generated. A combinatorial optimization process is then used to find Pareto-optimal solutions for the multi-route assembly. This is coupled with a scoring model that predicts the overall fitness of a solution based on designs previously scored by the engineer as well as an evaluation system where the engineer can score new designs found through the use of the framework to update the scoring model. The framework is evaluated using a testcase from a car manufacturer showing a severalfold time reduction compared to a strictly manual process. Considering the time savings, the proposed framework has the potential to greatly reduce the overall routing processes of hoses and cables.

    Ort, förlag, år, upplaga, sidor
    The American Society of Mechanical Engineers, 2021
    Nyckelord
    multiobjective optimization, design automation, hose routing, path planning Topics:Optimization, Cables, Engineers, Manufacturing, Design automation, Pareto optimization, Path planning
    Nationell ämneskategori
    Maskinteknik
    Identifikatorer
    urn:nbn:se:liu:diva-184180 (URN)10.1115/DETC2021-71408 (DOI)978-0-7918-8539-0 (ISBN)
    Konferens
    ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference August 17-19, 2021, Virtual, Online
    Anmärkning

    Funding agencies: This work has been financed by Vinnova and by governmentand industry cooperation on vehicles of the future, within the research project AUTOPACK 2017-03065

    Tillgänglig från: 2022-04-06 Skapad: 2022-04-06 Senast uppdaterad: 2022-04-07
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  • 166.
    Gåhlin, Fredrik
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion.
    Smith Siljestrand, Jakob
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion.
    Effektivisering av omställningsprocesser på ETP Transmission AB: En SMED-analys på hylstillverkning i svarv- och fräsmaskiner2021Självständigt arbete på grundnivå (högskoleexamen), 10,5 poäng / 16 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Det här projektet har under våren 2021 utförts som ett examensarbete på uppdrag av ETP Transmission AB. Företaget är beläget i Linköping och producerar hydrauliska axel-/navförband till flera olika marknader och användningsområden. Enkelheten att montera och applicera samt deras höga kvalitet är något som utmärker produkterna. 

    Syftet var att undersöka och utarbeta förbättringsförslag för företagets omställningsprocesser, framför allt vid lågvolymstillverkning. Målet var att försöka reducera ställtiden med 25–50%. För att uppnå det användes metoden Single Minute Exchange of Die (SMED) som är ett verktyg för att reducera ställtider. Valet av SMED gjordes efter en litteraturstudie där metoden visat goda resultat i liknande projekt.

    Nuläget analyserades med videoupptagning, spaghettidiagram och intervjuer med anställda. Det filmade materialet bearbetades i programvaran AviX, där omställningsarbetet kunde brytas ner i operationer och sorteras som inre eller yttre ställ. De största orsakerna till de nuvarande ställtiderna var verktygsbyten inklusive kalibrering samt programskrivning för nya produkter under omställningsprocessen.

    Med kunskap från teorin och framtagandet av nulägesanalysen utarbetades förbättringsförslag. De olika förslagens styrkor och svagheter analyseras samt vilken trolig effekt de skulle ha vid ett implementerande. För att tydligare illustrera förbättringsförslagens förväntade effekt samt belysa den arbetsinsats som krävs för att implementera dem, gjordes en PICK-analys.

    Resultatet visade att den enskilt bästa lösningen var att fokusera på samkörning av produkter med liknande verktygsuppsättning. Den teoretiska förbättringen för ETP Transmission AB:s mest sålda produkt var en ställtidsreducering med ca 30%. Ett ännu bättre teoretiskt resultat erhölls då förbättringsförslagen kombinerades. För produktgruppen Express gav en sådan kombinationslösning en teoretisk reducering på ca 47%. 

    Slutligen belyser rapporten vikten av att jobba med Lean och mäta mer i produktionen. 

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  • 167.
    Hadera, Hubert
    et al.
    Technical University of Dortmund, Germany.
    Wide, Per
    Linköpings universitet.
    Harjunkoski, Iiro
    ABB Corporate Research, Germany.
    Mäntysaari, Juha
    ABB Oy Industry Solutions, Finland.
    Ekström, Joakim
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Kommunikations- och transportsystem. Linköpings universitet, Tekniska fakulteten.
    Sand, Guido
    ABB Corporate Research, Germany.
    Engell, Sebastian
    Technical University of Dortmund, Germany.
    A Mean Value Cross Decomposition Strategy for Demand-side Management of a Pulping Process2015Ingår i: 2th International Symposium on Process Systems Engineering and 25th European Symposium on Computer Aided Process Engineering / [ed] Krist V. Gernaey; Jakob K. Huusom; Rafiqul Gani, Elsevier , 2015, Vol. 37, s. 1931-1936Konferensbidrag (Refereegranskat)
    Abstract [en]

    Energy is becoming a critical resource for process industries as introduction of new policies drive changes in the energy supply systems. Energy availability and pricing is much more volatile. In this study, we propose a Mean Value Cross Decomposition approach to functionally separate production scheduling from energy-cost optimization. Such a decomposition makes it possible to exploit existing optimization solutions avoiding a need to create a new monolithic model. The proposed framework is applied to a continuous process of thermo-mechanical pulping using a discrete-time Resource-Task Network model. Example case study scenarios show that the approach gives optimal system-wide solutions while keeping the models separated.

  • 168.
    Haidabrus, Bohdan
    et al.
    Sumy State Univ, Ukraine.
    Druzhinin, Eugen
    Natl Aerosp Univ, Ukraine.
    Elg, Mattias
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Logistik- och kvalitetsutveckling. Linköpings universitet, Tekniska fakulteten. Linköpings universitet, HELIX Competence Centre.
    Martin, Jason
    Linköpings universitet, Tekniska fakulteten. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Logistik- och kvalitetsutveckling.
    Grabis, Janis
    Riga Tech Univ, Latvia.
    Programs to Boost IT-Readiness of the Machine Building Enterprises2020Ingår i: ADVANCES IN DESIGN, SIMULATION AND MANUFACTURING II, SPRINGER INTERNATIONAL PUBLISHING AG , 2020, s. 75-84Konferensbidrag (Refereegranskat)
    Abstract [en]

    One of the important aspects of providing the high level of the enterprises competitiveness on the market is existence of the necessary level of IT-readiness. By using the term "IT-readiness" we mean the ability of the enterprise to reach the mission by the most effective use of modern information technologies. There are contradictions between the need of the enterprise operatively to reconstruct design and production structures accordingly to the market condition change and the level of the modern IT use for maintenance of science intensive samples creation projects. The problem situation becomes complicated because of the lack of possibility of the fast development of expensive information support systems through the absence of big financial resources for the machine building enterprises in the conditions of an unstable investment climate and a low level of profitability. It leads to the need of the stage-by-stage IT introduction in the course of a life cycle support of a new equipment creation project that is also a characteristic for the machine building enterprises. It turned out that the high technology development is carried out now under the conditions of essential restrictions of financial resources all around the world. In these conditions one of progressive ideologies is Lean Manufacturing methodology. World experience shows that the success of this ideology introduction is directly connected with an effective use of modern information technologies of the high technology samples design and business management. Thus, an important question is the compliance of the enterprise to the necessary level of IT-readiness which is directly connected with a technological maturity.

  • 169.
    Hallack, Elias
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska fakulteten.
    Mario Peris, Nestor
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska fakulteten.
    Lindahl, Mattias
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska fakulteten.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska fakulteten.
    Systematic Design for Recycling Approach – Automotive Exterior Plastics2022Ingår i: Proceedings of the 29th CIRP Conference Life Cycle Engineering, Amsterdam, Netherlands: Elsevier, 2022, Vol. 105, s. 204-209Konferensbidrag (Refereegranskat)
    Abstract [en]

    Car components are getting more advanced when meeting customer requirements. At the same time, the requirements of having cars that are easily dismantled and recycled also increase. At Volvo Cars, there is a need to have car components adapted to ease disassembly, where one example is exterior plastic components. However, end-of-life processes of car dismantling are seldom thought of when designing exterior plastic components. Therefore, this paper aims to develop a systematic design approach to support the Design for Recycling of exterior plastic components from an end-of-life perspective. We investigated challenges, factors, and practices that affect the recycling of the cars’ exterior plastic components. In addition, we studied end-of-life and eco-design tools that are used in industry and meet the requirements established by Volvo Cars. This was then used to develop a systematic design approach to support Design for Recycling. It encompasses three steps: 1) checking the investigated component against the identified end-of-life practices (helps to identify problems and generates solutions for design improvements ), 2) comparing the generated design improvements in terms of the environmental aspect (contributes to environmentally-driven decisions), and 3) evaluating the economic recycling benefits of the design improvements. The approach can be used within the automotive industry to improve the Design for Recycling of exterior plastic components and contribute to achieving a more circular economy.

  • 170.
    Hallberg, Henrik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling.
    I.T.R.I.P. Intelligent TrafikRegels och InformationsProgram: Ett säkerhetskoncept2007Självständigt arbete på avancerad nivå (magisterexamen), 20 poäng / 30 hpStudentuppsats
    Abstract [sv]

    Varje år dör det cirka 500 personer i den svenska trafiken. En strävan att sänka detta olyckstal är uttalat av den svenska regeringen och som effekt av detta har nollvisionen vuxit fram. De allvarliga olyckorna på de svenska vägarna har minskat tack vara kontinuerliga förbättringar av säkerhet i och kring fordon, men på grund av ökad trafikintensitet börjar antalet dödade i trafiken stagnera vid 500 personer per år. För hög fart på dåligt utformade vägsträckor är en bidragande faktor till varför en olycka inträffar och vilka konsekvenser denna olycka resulterar i. I dagens trafiksamhälle tenderar förare att negligera små hastighetsöverträdelser. Tanken med detta examensarbete är att undersöka om ett, för detta arbete framtaget informationssystem, kan få förare mer uppmärksamma på sin hastighet i förhållande till laglig hastighet och därmed eventuellt sänka sin hastighet till laglig nivå

    De praktiska testerna genomfördes i hos Avdelningen för Industriell Arbetsvetenskap vid Linköpings Universitet. De simulatortester som genomfördes utfördes av totalt 16 personer som vardera körde tre likadana scenarier med varierande informationsmängd angående gällande laglig hastighet. Försöken jämfördes med varandra och slutsatsen blev att det existerar en skillnad mellan att nyttja den variabla informationen, vilken beskrivs i detta arbete och att inte få någon tilläggsinformation. De mätdata som gavs korrelerade väl med vad testpersonerna ansåg. Det testade systemet var till hjälp, speciellt vid körning på sträckor med en begränsning av 70 km/h.

    Resultatet av detta arbete innebär att körning med stödsystem ger en bättre anpassning av hastigheten i förhållande till den gällande lagliga hastigheten i flertalet fall. Försökspersonerna trivdes med systemet och ansåg sig gärna vilja nyttja ett liknande system i sina privata fordon. De hastighetsvariationer som framkommit i simulatorexperimentet bör verifieras mot fältstudier, eftersom resultaten kan vara något missvisande. Dock visar resultaten på att ett hjälpsystem likt det testade systemet mycket troligt skulle kunna sänka de vanliga ofrivilliga fortkörningarna och därmed öka trafiksäkerheten på vägarna. En fortsatt utveckling och forskning kring ett informationssystem likt det undersökta rekommenderas av författaren till detta examensarbete.

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  • 171.
    Hallgren, Axel
    et al.
    Linköpings universitet, Institutionen för tema, Tema Miljöförändring. Linköpings universitet, Filosofiska fakulteten.
    Hansson, Anders
    Linköpings universitet, Institutionen för tema, Tema Miljöförändring. Linköpings universitet, Centrum för klimatpolitisk forskning, CSPR. Linköpings universitet, Filosofiska fakulteten.
    Conflicting Narratives of Deep Sea Mining2021Ingår i: Sustainability, E-ISSN 2071-1050, Sustainability, ISSN 2071-1050, Vol. 13, nr 9, artikel-id 5261Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    As land-based mining industries face increasing complexities, e.g., diminishing return on investments, environmental degradation, and geopolitical tensions, governments are searching for alternatives. Following decades of anticipation, technological innovation, and exploration, deep seabed mining (DSM) in the oceans has, according to the mining industry and other proponents, moved closer to implementation. The DSM industry is currently waiting for international regulations that will guide future exploitation. This paper aims to provide an overview of the current status of DSM and structure ongoing key discussions and tensions prevalent in scientific literature. A narrative review method is applied, and the analysis inductively structures four narratives in the results section: (1) a green economy in a blue world, (2) the sharing of DSM profits, (3) the depths of the unknown, and (4) let the minerals be. The paper concludes that some narratives are conflicting, but the policy path that currently dominates has a preponderance towards Narrative 1—encouraging industrial mining in the near future based on current knowledge—and does not reflect current wider discussions in the literature. The paper suggests that the regulatory process and discussions should be opened up and more perspectives, such as if DSM is morally appropriate (Narrative 4), should be taken into consideration.

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    Hallgren_Hansson2021
  • 172.
    Hallgren, Mattias
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling.
    Competitive strategies and manufacturing focus: an empirical analysis2007Ingår i: International Journal of Production EconomicsArtikel i tidskrift (Refereegranskat)
  • 173. Beställ onlineKöp publikationen >>
    Hallgren, Mattias
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling. Linköpings universitet, Tekniska högskolan.
    Manufacturing Strategy, Capabilities and Performance2007Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    This dissertation addresses the topic of manufacturing strategy, especially the manufacturing capabilities and operational performance of manufacturing plants. Manufacturing strategy research aims at providing a structured decision making approach to improve the economics of manufacturing and to make companies more competitive.

    The overall objective of this thesis is to investigate how manufacturing companies make use of different manufacturing practices or bundles of manufacturing practices to develop certain sets of capabilities, with the ultimate goal of supporting the market requirements. The thesis aims to increase the understanding of the role of operations management and its immediate impact on manufacturing performance. Following the overall research objective three areas are identified to be of particular interest; to investigate (i) the relationship among different dimensions of operational performance, (ii) the way different performance dimensions are affected by manufacturing practices or bundles of manufacturing practices, (iii) whether there are contingencies that may help explain the relationships between dimensions of manufacturing capabilities or the effects of manufacturing practices or bundles of manufacturing practices on operational performance.

    The empirical elements in this thesis use data from the High Performance Manufacturing (HPM) project. The HPM project is an international study of manufacturing plants involving seven countries and three industries.

    The research contributes to several insights to the research area of manufacturing strategy and to practitioners in manufacturing operations. The thesis develops measurements for and tests the effects of several manufacturing practices on operational performance. The results are aimed at providing guidance for decision making in manufacturing companies. The most prominent implication for researchers is the manifestation of the customer order decoupling point as an important contingency variable to consider when studying manufacturing operations.

    Delarbeten
    1. Quantification in manufacturing strategy: a methodology and illustration
    Öppna denna publikation i ny flik eller fönster >>Quantification in manufacturing strategy: a methodology and illustration
    2006 (Engelska)Ingår i: International Journal of Production Economics, ISSN 0925-5273, Vol. 104, nr 1, s. 113-124Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    Strategic decision-making is often based on conceptual and qualitative models. Considering the vast amount of quantitative models in the literature, it is most interesting and important to explore the possibilities to expand the modelling base for decision-making with quantitative models that can provide deeper analysis, new insights and allow for finer sensitivity analysis. The purpose of this paper is to explore various aspects of quantification in manufacturing strategy-related issues. We review current approaches to quantitative modelling and study how quantitative models are being used and can be used for strategic decision-making in manufacturing. We create a framework and methodology for quantitative modelling for manufacturing strategy, based on market requirements, manufacturing capabilities, manufacturing actions within decision categories, and quantitative modelling approach. The framework methodology includes seven stages of quantification, for the purpose of measuring, linking, comparing, and modelling. The aim of the paper is to provide a structure that can aid in the modelling of strategic manufacturing decisions to improve the capabilities to meet market requirements.

    Nyckelord
    Manufacturing strategy; Operations; Quantitative modelling
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-14542 (URN)10.1016/j.ijpe.2005.09.004 (DOI)
    Tillgänglig från: 2007-05-25 Skapad: 2007-05-25 Senast uppdaterad: 2010-06-14
    2. Differentiating manufacturing focus
    Öppna denna publikation i ny flik eller fönster >>Differentiating manufacturing focus
    2006 (Engelska)Ingår i: International Journal of Production Research, ISSN 0020-7543, Vol. 44, nr 18-19, s. 3863-3878Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    In order for a manufacturing firm to be competitive, by supporting the market requirements through the manufacturing function, manufacturing should focus on a narrow set of tasks. Focused manufacturing is concerned with the perspectives when designing a manufacturing facility, be it a factory, plant, or plant within a plant. Traditionally, focus has been on the product, the process, or the manufacturing task based on competitive priorities (order winners and qualifiers). So far, the literature implies that a certain facility should have only one focus. In this paper, we present a framework that differentiates focus with respect to different parts of the manufacturing value chain. The point around which focus needs to be differentiated is the customer order decoupling point. We associate alternative types of focus relative to the customer order decoupling point, separating the upstream and downstream parts, and create a framework for choosing focus and how to differentiate manufacturing focus.

    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-14543 (URN)10.1080/00207540600702290 (DOI)
    Tillgänglig från: 2007-05-25 Skapad: 2007-05-25
    3. Competitive strategies and manufacturing focus: an empirical analysis
    Öppna denna publikation i ny flik eller fönster >>Competitive strategies and manufacturing focus: an empirical analysis
    2007 (Engelska)Ingår i: International Journal of Production EconomicsArtikel i tidskrift (Refereegranskat) Submitted
    Nationell ämneskategori
    Produktionsteknik, arbetsvetenskap och ergonomi
    Identifikatorer
    urn:nbn:se:liu:diva-14544 (URN)
    Tillgänglig från: 2007-05-25 Skapad: 2007-05-25 Senast uppdaterad: 2010-05-31
    4. Competitive capabilities: a contingency perspective
    Öppna denna publikation i ny flik eller fönster >>Competitive capabilities: a contingency perspective
    2007 (Engelska)Ingår i: Journal of Operations Management, ISSN 0272-6963, E-ISSN 1873-1317Artikel i tidskrift (Övrigt vetenskapligt) Submitted
    Abstract [en]

    In this paper we present and test an alternative model for competitive capabilities.Traditionally, a cumulative model has been viewed as having one sequence of buildingoperations capabilities in a firm in support of market needs, including quality,delivery, cost efficiency and flexibility. Although appealing as a conceptual model,empirical testing has not been able to fully support the cumulative model. This paperacknowledges the need for differentiated approaches to managing capability indifferent operating environments. The competitive capability model that is presented istested empirically using data from the High Performance Manufacturing (HPM) study,including three industries and seven countries – a total of 211 plants. The results showthat there is empirical support for differentiating the competitive capabilities; firmsproducing to stock follow a path of quality, delivery and cost, whereas those producingto customer order exhibit a capability path in the order of quality, delivery andflexibility. Thus, while quality and delivery are common, cost and flexibility acts asdifferentiators contingent upon the manufacturing environment.

    Nyckelord
    Operations strategy; Empirical research; Competitive capabilities; Decoupling point
    Identifikatorer
    urn:nbn:se:liu:diva-53024 (URN)
    Tillgänglig från: 2010-01-14 Skapad: 2010-01-14 Senast uppdaterad: 2017-12-12
    5. Flexibility configurations: Empirical analysis of volume and product mix flexibility
    Öppna denna publikation i ny flik eller fönster >>Flexibility configurations: Empirical analysis of volume and product mix flexibility
    2009 (Engelska)Ingår i: Omega: The International Journal of Management Science, ISSN 0305-0483, E-ISSN 1873-5274, Vol. 37, nr 4, s. 746-756Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    In this paper we address flexibility and investigate the relationship between volume and product mix flexibility. One view of flexibility is that of being a capability in itself: another view is that of flexibility as an enabler, providing the manufacturing system with properties on which other competitive capabilities are built. In this research, the latter view of flexibility is used, where flexibility acts as a second order competitive criterion. The aim is to differentiate between two dimensions of flexibility important to the manufacturing value chain, i.e., volume and product mix flexibility, and to investigate how different flexibility configurations are related to Various manufacturing practices. A clustering research approach is used to identify groups of companies based on flexibility configurations. The groups are then analyzed with respect to characteristics and impact on operational performance. For the empirical investigation, we use empirical data from the high performance manufacturing (HPM) study, including three industries and seven countries-a total of 211 plants. We find that flexibility configurations based on high or low levels of volume and mix flexibility combinations show significant differences both in terms of operational performance, and in terms of emphasis put into different flexibility source factors.

    Ort, förlag, år, upplaga, sidor
    Kidlington, Oxford, United Kingdom: Pergamon Press, 2009
    Nyckelord
    Empirical research, Flexible manufacturing, Operations management, Survey, Value chain
    Nationell ämneskategori
    Produktionsteknik, arbetsvetenskap och ergonomi
    Identifikatorer
    urn:nbn:se:liu:diva-16407 (URN)10.1016/j.omega.2008.07.004 (DOI)000262063700002 ()
    Anmärkning

    Original Publication: Mattias Hallgren and Jan Olhager, Flexibility configurations: Empirical analysis of volume and product mix flexibility, 2009, OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE, (37), 4, 746-756. http://dx.doi.org/10.1016/j.omega.2008.07.004 Copyright: Elsevier Science B.V., Amsterdam. http://www.elsevier.com/

    Tillgänglig från: 2009-02-09 Skapad: 2009-01-23 Senast uppdaterad: 2017-12-14Bibliografiskt granskad
    6. Lean and agile manufacturing: external and internal drivers and performance outcomes
    Öppna denna publikation i ny flik eller fönster >>Lean and agile manufacturing: external and internal drivers and performance outcomes
    2009 (Engelska)Ingår i: International Journal of Operations & Production Management, ISSN 0144-3577, E-ISSN 1758-6593, Vol. 29, nr 10, s. 976-999Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    Purpose - Lean and agile manufacturing are two initiatives that are used by manufacturing plant managers to improve operations capabilities. The purpose of this paper is to investigate internal and external factors that drive the choice of lean and agile operations capabilities and their respective impact on operational performance. Design/methodology/approach - Lean and agile manufacturing are each conceptualized as a second-order factor and measured through a bundle of distinct practices. The competitive intensity of industry and the competitive strategy are modeled as potential external and internal drivers, respectively, and the impact on quality, delivery, cost, and flexibility performance is analyzed using structural equations modeling. The model is tested with data from the high performance manufacturing project comprising a total of 211 plants from three industries and seven countries. Findings - The results indicate that lean and agile manufacturing differ in terms of drivers and outcomes. The choice of a cost-leadership strategy fully mediates the impact of the competitive intensity of industry as a driver of lean manufacturing, while agile manufacturing is directly affected by both internal and external drivers, i.e. a differentiation strategy as well as the competitive intensity of industry. Agile manufacturing is found to be negatively associated with a cost-leadership strategy, emphasizing the difference between lean and agile manufacturing. The major differences in performance outcomes are related to cost and flexibility, such that lean manufacturing has a significant impact on cost performance (whereas agile manufacturing has not), and that agile manufacturing has a stronger relationship with volume as well as product mix flexibility than does lean manufacturing. Research limitations/implications - Cross-sectional data from three industries and seven countries are used, and it would be interesting to test this model for more industries and countries. Practical implications - The results provide insights into the factors that influence the choice of lean or agile manufacturing for improving operations, and the results that can be obtained. Originality/value - To the authors knowledge, this is the first large-scale empirical survey of leanness and agility simultaneously, using data from manufacturing firms in Europe, Asia, and North America. The model incorporates a wide perspective on factors related to lean and agile manufacturing, to be able to identify similarities and differences.

    Ort, förlag, år, upplaga, sidor
    Emerald Group Publishing Limited, 2009
    Nyckelord
    Lean production, Agile production, Operations management
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-51776 (URN)10.1108/01443570910993456 (DOI)000271206100001 ()
    Tillgänglig från: 2009-11-18 Skapad: 2009-11-17 Senast uppdaterad: 2017-12-12Bibliografiskt granskad
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  • 174.
    Hallgren, Mattias
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktionsekonomi. Linköpings universitet, Tekniska högskolan.
    Olhager, Jan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktionsekonomi. Linköpings universitet, Tekniska högskolan.
    Flexibility configurations: Empirical analysis of volume and product mix flexibility2009Ingår i: Omega: The International Journal of Management Science, ISSN 0305-0483, E-ISSN 1873-5274, Vol. 37, nr 4, s. 746-756Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In this paper we address flexibility and investigate the relationship between volume and product mix flexibility. One view of flexibility is that of being a capability in itself: another view is that of flexibility as an enabler, providing the manufacturing system with properties on which other competitive capabilities are built. In this research, the latter view of flexibility is used, where flexibility acts as a second order competitive criterion. The aim is to differentiate between two dimensions of flexibility important to the manufacturing value chain, i.e., volume and product mix flexibility, and to investigate how different flexibility configurations are related to Various manufacturing practices. A clustering research approach is used to identify groups of companies based on flexibility configurations. The groups are then analyzed with respect to characteristics and impact on operational performance. For the empirical investigation, we use empirical data from the high performance manufacturing (HPM) study, including three industries and seven countries-a total of 211 plants. We find that flexibility configurations based on high or low levels of volume and mix flexibility combinations show significant differences both in terms of operational performance, and in terms of emphasis put into different flexibility source factors.

    Ladda ner fulltext (pdf)
    FULLTEXT01
  • 175.
    Hallgren, Mattias
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktionsekonomi. Linköpings universitet, Tekniska högskolan.
    Olhager, Jan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktionsekonomi. Linköpings universitet, Tekniska högskolan.
    Schroeder, Roger G.
    University of Minnesota, USA .
    A hybrid model of competitive capabilities2011Ingår i: International Journal of Operations & Production Management, ISSN 0144-3577, E-ISSN 1758-6593, Vol. 31, nr 5, s. 511-526Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Purpose – The purpose of this paper is to present and test a new model for competitive capabilities.Traditionally, a cumulative model has been viewed as having one sequence of building competitivecapabilities in a firm in support of market needs, including quality, delivery, cost efficiency andflexibility. Although appealing as a conceptual model, empirical testing has not been able to fullysupport the cumulative model. This paper acknowledges the need for a hybrid approach to managingcapability progression. It brings together the literature on trade-offs, cumulative capabilities, andorder winners and qualifiers.Design/methodology/approach – A new hybrid approach for modelling competitive capabilities istested empirically using data from the high performance manufacturing (HPM) study, round 3,including three industries and seven countries – a total of 211 plants.Findings – The hybrid model shows significantly better fit with the data from the sample than thecumulative models suggested by previous literature. Empirical support is found for the traditionalperception that a high level of quality is a prerequisite for a high level of delivery performance.However, cost efficiency and flexibility do not exhibit a cumulative pattern. Instead, the results showthat they are developed in parallel. The findings suggest that a balance between cost efficiency andflexibility is built upon high levels of quality and delivery performance.Research limitations/implications – Since we limit the empirical investigation to three industriesand seven countries, it would be interesting to extend the testing of this model to more industries andcountries. This research shows that combining perspectives and insights from different researchstreams – in this case, trade-off theory and the concepts of cumulative capabilities, and order winnersand qualifiers – can be fruitful.Practical implications – The results of this paper provides managers with guidelines concerningthe configuration of competitive capabilities. First, a qualifying level of quality needs to be attained,followed by a qualifying level of delivery. Then, a balance between potential order winners, i.e. costefficiency and flexibility, needs to be attained.Originality/value – This paper presents a new approach to modelling competitive capabilities thatsynthesises previous research streams and perspectives from cumulative capabilities, contestingcapabilities (trade-offs), and order winners and qualifiers.

  • 176.
    Hamilton, Jakob
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Jeresi, Mahmoud
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Geometry-Based Requirements: Support requirement owners in connecting and mediating requirements from SystemWeaver to CATIA V52018Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Requirements of a Volvo car are stored in a requirements management system at Volvo Car Group (VCG). VCG recently implemented a new requirements management system, a system called SystemWeaver. Many different types of requirements are stored in the SystemWeaver software, where the requirements can only be described in text and pictures. However, some requirements are geometry-based, describing some type of shape or measurement in space that the car should fulfil. Geometry-based requirements are stored in Teamcenter and have two components, the requirement text and requirement geometry in the form of CAD-models. The models are used to illustrate the requirement in space. This master thesis examines the possibilities of connecting text-based requirements in SystemWeaver to requirement geometries. The technical aspects are studied as well as the organizational mechanisms of creating and changing a geometry-based requirement. To find a working solution, research relating to the issue gave input to the project. Furthermore, interviews were conducted at different departments at VCG to get insight in the working tasks of requirement management at the company. The project resulted in a concept of a new process, describing the actions of geometry-based requirement management and how requirement geometries should be connected to SystemWeaver. The new concept outlined the logical steps that are required to work with SystemWeaver and geometry-based requirements. The work has laid a foundation on which future studies can be conducted to further streamline management of geometry-based requirements at VCG. 

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  • 177.
    Hasselhorn, Tilmann
    Linköpings universitet, Institutionen för beteendevetenskap, Centrum för studier av människa, teknik och organisation, CMTO. Linköpings universitet, Institutionen för konstruktions- och produktionsteknik, Industriell arbetsvetenskap. Linköpings universitet, Tekniska högskolan.
    Första linjens chefer: upplevt arbete i en industriell verksamhet2002Licentiatavhandling, monografi (Övrigt vetenskapligt)
    Abstract [sv]

    Arbetsledningens karaktär har förändrats varaktigt under det senare decenniet som följd av nya produktionsfilosofier. Med införandet av team- och processorienterade arbetsorganisationsformer har speciellt karaktären av arbetsledande befattningar närmast produktionsprocessen påverkats. Avhandlingen tar sin utgångspunkt i frågan hur arbetsledarna respektive första linjens chefer upplever sitt arbete i en sådan förändrad, industriell verksamhet. Syftet var att åstadkomma en bättre förståelse för hur dessa chefer upplever, handskas med och gestaltar sin förändrade befattning. Resultaten bygger på datamaterial från halvstandardiserade intervjuer med första linjens chefer tillhörande produktionsdelen av ett svenskt verkstadsindustriföretag. Första linjens chefers redogörelse av sin upplevelse kring chefsarbete återges i sammanfattad form i första resultatdelen. En vidaregående analys med ett rollteoretiskt perspektiv beskriver ett antal förekommande chefsdilemman. Dilemman visar sig ha sin grund i huvudsakligen två konflikter: intra-sändarekonflikter och person-rollkonflikter. De förstnämnda domineras av dubbla budskap som företaget ger upphov till. De senare handlar om chefernas och medarbetarnas motstridiga förväntningar på hur chefsrollen ska utövas.

  • 178.
    Helldal, Michael
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik.
    Tenne, Sofia
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik.
    Positiva miljöeffekter i kölvattnet av Lean produktion: Kan en integrering av miljöaspekter och Lean produktion bidra till att nå synergieffekter och minska risken för suboptimering?2009Självständigt arbete på avancerad nivå (magisterexamen), 20 poäng / 30 hpStudentuppsats
    Abstract [sv]

    Denna rapport är resultatet av ett examensarbete utfört vid Institutionen för industriell och ekonomisk utveckling vid Linköpings universitet på uppdrag av konsultbolaget Sustainia AB. Lean produktion, ofta benämnt Lean, har det senaste decenniet blivit en allt mer attraktiv produktionsfilosofi för att minska kostnader och öka kundnöjdhet genom förbättrad leveransservice och effektivare flöde. Ett flertal författare har påpekat att införandet av Lean direkt kan förbättra ett företags miljöprestanda, främst till följd av det minskade slöseri som Lean avser ge upphov till. Vidare finns studier som visar att vissa möjligheter till förbättringar och kostnadsbesparingar riskerar att gå oupptäckta om verksamheten ses ur ett strikt Lean-perspektiv. Med ett miljösynsätt finns dock chans att dessa blir upptäckta. Detta indikerar att såväl kostnads- som miljömässiga fördelar kan nås genom en integration av arbetet med Lean och miljöaspekter.

    Syftet med detta examensarbete har varit att undersöka hur ett företags arbete med Lean respektive miljöaspekter påverkar varandra för att ta reda på om och hur väl de båda arbetssätten skulle kunna fungera tillsammans. Om det visade sig att en integration av Lean och miljö vore möjlig och fördelaktig ur affärsmässig synvinkel skulle sedermera ett förslag tas fram på hur en sådan modell skulle kunna se ut. Arbetets syfte har uppfyllts genom en kombination av litteraturstudier och intervjuer. Fyra svenska företag som arbetar enligt Lean och även har ett uttalat aktivt miljöarbete intervjuades gällande sitt sätt att arbeta med Lean och miljöfrågor samt hur de såg på en eventuell integration av de två arbetssätten.

    Utifrån resultaten från litteratur- och intervjustudien kan konstateras att flera av grundtankarna inom såväl Lean som miljöarbete stöder varandra. Inom båda arbetssätten ses kontinuerliga förbättringar och eliminering av slöseri som viktiga inslag, och båda främjar en organisationskultur där personalen uppmuntras att lösa problem och förbättra företagets prestation. Vissa enskilda verktyg inom Lean riskerar emellertid att ha en negativ inverkan på företagets miljöprestanda, något som i många fall dock kan avhjälpas genom god planering.

    Till ett företags miljöarbete kan Lean bidra med ett proaktivt förhållningssätt och strukturerat arbetssätt och därmed få organisationen att arbeta mer förebyggande och långsiktigt med miljöfrågor. De intervjuade företagen ansåg att Lean generellt hade en positiv inverkan på deras miljöarbete, även om de inte hade gjort någon utvärdering av hur arbetet med Lean påverkat deras miljönyckeltal. De kvantitativa data som erhölls från litteraturstudien pekade på att arbete med Lean kan leda till en direkt minskning av företagets miljöpåverkan inom flera områden. Med utgångspunkt i dessa kvantitativa och kvalitativa data anser författarna således att det finns starka och tydliga tecken som visar på att Lean kan ha en positiv inverkan på miljörelaterade nyckeltal. Ett aktivt miljöarbete kan å sin sida bidra till arbetet med Lean genom att besparingsmöjligheter, som annars skulle riskerat att förbli oupptäckta, uppdagas.

    Studien visade vidare att det inte bara är möjligt att integrera arbete med Lean och miljö, utan att en sådan integration dessutom har potential att vara fördelaktigt ur såväl ett ekonomiskt som ett miljömässigt perspektiv. En integrering kan minska risken för suboptimeringar, och synergieffekter kan erhållas som innebär att större framgångar kan uppnås än vad som skulle ha varit möjligt om arbetet med Lean och miljö hade bedrivits isolerat. Med vetskapen om att en integration är möjlig och har potential att vara fördelaktig ur företagsekonomisk och miljömässig synvinkel utarbetade författarna en modell för hur Lean och miljöarbete kan bedrivas integrerat. I samråd med Sustainia AB bestämdes att denna modell skulle kallas Green Lean, vilket således åsyftar en miljöanpassad, ”grön” form av Lean.

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  • 179.
    Hellman, Pasi
    et al.
    Department of Production, University of Vaasa, Vaasa, Finland.
    Liu, Yang
    Department of Production, University of Vaasa, Vaasa, Finland.
    Development of Quality Management Systems: How Have Disruptive Technological Innovations in Quality Management Affected Organizations?2013Ingår i: Quality Innovation Prosperity, ISSN 1335-1745, E-ISSN 1338-984X, Vol. 17, nr 1, s. 104-119Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This research investigates the history of quality and development of quality management systems. History of quality is investigated from Hammurabi’s law all the way to today’s reigning quality initiatives including ISO, Six Sigma and Lean manufacturing. In the last chapters the current state of quality management is being examined. The foresight method is also opened up and examined. The Innovator’s dilemma concept, originally presented by Clayton Christensen, is used to analyse how quality management systems have been evolved in the last 100 years. Special emphasis is placed on the US manufacturing in the 1970s and 1980s. Based on the literature, the concept of Innovator’s dilemma and the fall of US manufacturing are merged. The result is a prime example that the Innovator’s Dilemma is a universal phenomenon. The industry leader is trying to maintain its position and do everything right but still it is destined to fail. The causes and effects are being discussed in later chapters.

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  • 180. Beställ onlineKöp publikationen >>
    Hemphälä, Hillevi
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell arbetsvetenskap. Linköpings universitet, Tekniska högskolan.
    En god visuell arbetsmiljö: ögonbesvär, muskuloskeletala besvär och produktivitet hos brevbärare2008Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    This study appears to be one of few intervention studies with focus on eyestrain and lighting on non-computer workplaces. Previous studies have shown strong connections between eyestrain and musculoskeletal strain. The eyes “lead the body” and if the picture on the retina is unfocused the body adjusts the posture, trying to improve the image through changing the viewing distance. This can lead to an unnatural body posture which can contribute in the development of musculoskeletal disorders.

    A good visual environment with proper illuminance, good luminance contrast relationship, good uniformity value of the illuminance and no glare are the best conditions in order to function well at a visually demanding work. Sorting mail is a task that needs good visual ergonomics and can therefore be improved by a change in the visual environment.

    The overall purpose of this thesis is to investigate if a good visual environment have an impact on eyestrain, musculoskeletal strain, productivity, wellbeing, and work induced stress.

    This thesis is based on a literature review and a lighting intervention, with one part before the intervention and two follow-up parts, summer and winter. The results are based on objectively measurements; lighting, time studies, and optometric eye examinations, and two questionnaires. The first questionnaire concerned visual ergonomics and the second had a focus on wellbeing and experience of work related tasks.

    The postmen experienced the new lighting and labeling as improvement. A small decrease in the amount of eyestrain was present, and the younger postmen had a decrease of the musculoskeletal strain. The postmen with eyestrain got a small improvement of the sorting time. When the lighting was improved another factor that could cause strain appeared, the need for good correction in their glasses was identified as the main remaining factor that could cause the observed strain.

    Delarbeten
    1. Synergonomi vid postsortering
    Öppna denna publikation i ny flik eller fönster >>Synergonomi vid postsortering
    2005 (Engelska)Ingår i: Proceedings of the 37th Annual Conference of the Nordic Ergonomics Society, NES, October, Oslo, Norway, 2005Konferensbidrag, Publicerat paper (Övrigt vetenskapligt)
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-13079 (URN)
    Tillgänglig från: 2008-03-20 Skapad: 2008-03-20
    2. Vision ergonomics when sorting the mail
    Öppna denna publikation i ny flik eller fönster >>Vision ergonomics when sorting the mail
    2006 (Engelska)Ingår i: The 16th World Congress on Ergonomics, International Ergonomics Association, IEA, July, Maastricht, The Netherlands, 2006Konferensbidrag, Publicerat paper (Refereegranskat)
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-13080 (URN)
    Tillgänglig från: 2008-03-20 Skapad: 2008-03-20
    3. A lighting intervention for postmen – Effects on eyestrain, MSD, and productivity
    Öppna denna publikation i ny flik eller fönster >>A lighting intervention for postmen – Effects on eyestrain, MSD, and productivity
    2008 (Engelska)Ingår i: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126Artikel i tidskrift (Refereegranskat) Submitted
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-13081 (URN)
    Tillgänglig från: 2008-03-20 Skapad: 2008-03-20 Senast uppdaterad: 2017-12-13
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    FULLTEXT01
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    COVER01
  • 181. Beställ onlineKöp publikationen >>
    Henriksson, Fredrik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Introducing New Materials in the Automotive Industry: Managing the Complexity of Introducing New Materials in Existing Production Systems2017Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    Passenger vehicles are central to Western society, and contribute to a significant part of our greenhouse gas emissions. In order to reduce emissions, the automotive industry as a whole is working to reduce mass in passenger vehicles in order to reduce energy consumption. One way to reduce mass is to introduce lightweight materials in the body of the vehicle. This research aims to explore the relationship between product and production system when introducing new materials.

    Besides a theoretical review and an industry-centered technological mapping, four case studies have been conducted during the course of this licentiate thesis. Two case studies were conducted with engineering design students working as development teams, one case study with the author as the developer and finally one case study in an industrial environment at a product owning company with in-house production. The goal of the case studies has been to increase the collective knowledge of how product development decisions affect production development decisions, and vice versa, when developing passenger vehicles in new materials.

    In the following analysis of case study outcomes, a number of factors important for introducing new materials are discussed. The relationship between product and production is investigated, both in terms of how the production system affects the product and how the product affects the production system. The outcome from this analysis is a mapping of important factors for automotive industry companies to understand and identify when looking at introducing new materials in existing production systems. Finally, a suggestion for future research efforts is presented.

    Delarbeten
    1. An outlook on multi material body solutions in the automotive industry – possibilities and manufacturing challenges
    Öppna denna publikation i ny flik eller fönster >>An outlook on multi material body solutions in the automotive industry – possibilities and manufacturing challenges
    2016 (Engelska)Ingår i: SAE Technical Paper Series, Detroit (MI), USA: Society of Automotive Engineers, 2016Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    In the automotive industry, mass reduction and lightweight design is a continuing trend that does not show signs of declining. When looking at where to reduce weight in a vehicle, the body is a preferential subsystem due to its large contribution to overall mass and the stability of body composition over a specific model range. The automotive industry of today moves toward a greater differentiation in materials that compose a car, which can be seen in the several different multi material vehicle bodies that have been introduced by manufacturers in recent years. But while mixing materials may contribute to a good compromise between weight reduction and vehicle cost, it also proposes a number of challenges that need to be addressed. Among other material factors, the different coefficients of thermal expansions might introduce new stresses during painting and curing. Joining processes and possible chemical reactions between materials also needs to be taken into account, the same with the question of whether to integrate or differentiate different functions in a system. If the manufacturing plant uses mixed model assembly lines, design of end effectors for gripping multiple different materials is another challenge not previously encountered in this context. In this paper, a number of production and manufacturing related challenges are discussed, and the authors highlight different areas where the requirements of design engineering tools needs to be evaluated for these new multi material concepts and design decisions in order for automotive manufacturers to ensure future market competitiveness.

    Ort, förlag, år, upplaga, sidor
    Detroit (MI), USA: Society of Automotive Engineers, 2016
    Nyckelord
    Multi material bodies, Production development, Product development
    Nationell ämneskategori
    Produktionsteknik, arbetsvetenskap och ergonomi
    Identifikatorer
    urn:nbn:se:liu:diva-127319 (URN)10.4271/2016-01-1332 (DOI)
    Konferens
    SAE 2016 World Congress and Exhibition
    Projekt
    Produktion2030 - Storskalig tillverkning av produkter i flera material
    Forskningsfinansiär
    VINNOVA
    Tillgänglig från: 2016-04-20 Skapad: 2016-04-20 Senast uppdaterad: 2021-08-19Bibliografiskt granskad
    2. On Material Substitution in Automotive BIWs – From Steel to Aluminum Body Sides
    Öppna denna publikation i ny flik eller fönster >>On Material Substitution in Automotive BIWs – From Steel to Aluminum Body Sides
    2016 (Engelska)Ingår i: 26TH CIRP DESIGN CONFERENCE / [ed] Wang, Lihui; Kjellberg, Torsten, Elsevier, 2016, Vol. 50, s. 683-688Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    Weight reduction and material substitution are increasing trends in the automotive industry. In this project, the task of substituting the steel body side in the monocoque of a large SUV towards an aluminum body side was investigated through a design engineering approach adopting a breadth-first analysis method. One conclusion based on the analysis is that the choice of joining technology would become arbitrary due to the breadth-first approach. In this paper, the authors present their findings from the aforementioned case, including the challenges with switching between materials with fundamentally different properties when performing material substitution projects. The possibility of having taken a depth-first analysis approach, and the possible effects on the project result, is discussed.

    Ort, förlag, år, upplaga, sidor
    Elsevier, 2016
    Serie
    Procedia CIRP, ISSN 2212-8271 ; 50
    Nationell ämneskategori
    Produktionsteknik, arbetsvetenskap och ergonomi
    Identifikatorer
    urn:nbn:se:liu:diva-130510 (URN)10.1016/j.procir.2016.05.028 (DOI)000387666600115 ()
    Konferens
    26th CIRP Design Conference
    Projekt
    Produktion 2030 - Storskalig tillverkning av produkter i flera material
    Forskningsfinansiär
    VINNOVA
    Tillgänglig från: 2016-08-11 Skapad: 2016-08-11 Senast uppdaterad: 2021-08-19
    3. Including Student Case Projects in Integrated Product and Production Development Research – Methodology Description and Discussion
    Öppna denna publikation i ny flik eller fönster >>Including Student Case Projects in Integrated Product and Production Development Research – Methodology Description and Discussion
    2016 (Engelska)Konferensbidrag, Enbart muntlig presentation (Övrigt vetenskapligt)
    Abstract [en]

    Within integrated product and production development research, casestudies needto be performed for data gathering purposes. Today, there are two commonly used ways to perform this research; observingindustry projects orhaving the researchers perform the projects themselves. The first option can pose data access and IPRissues, and the second optioncomes with biasing risks. Another approach is to work with studentcaseprojects, givingstudents interesting projects and findinga solution to mediate both data gathering opportunity and biasing risks. This approach has been tested at Linköping University, with students performing projects in the Vinnovafunded Production 2030 –Large Scale Production in Mixed Materials project. Two larger student case projects have been performed on the topic of material substitution and mixed material solutions within the automotive industry.In this paper, the method used to include student projects is presented along with identified benefits and drawbacks. Including student case projects in research have shown to be beneficial in research on processes, projects and methodology, but needs to be complemented by data fromindustry projects and the researcher ́s own work within integrated product and production development in order to create a more reliable analysis with high level of detail.

    Nyckelord
    Case studies, Integrated product and production development, mixed material solutions
    Nationell ämneskategori
    Produktionsteknik, arbetsvetenskap och ergonomi
    Identifikatorer
    urn:nbn:se:liu:diva-142930 (URN)
    Konferens
    7th Swedish Production Symposium, SPS, Lund, October 25-27, 2016
    Forskningsfinansiär
    VINNOVA
    Anmärkning

    Fulltexten i denna post har endast gjorts tillgänglig via DiVA.

    The full text of this entry has only been made available via DiVA.

    Tillgänglig från: 2017-11-13 Skapad: 2017-11-13 Senast uppdaterad: 2017-11-20
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    Introducing New Materials in the Automotive Industry: Managing the Complexity of Introducing New Materials in Existing Production Systems
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  • 182.
    Henriksson, Fredrik
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Davidsson, Anna
    Volvo Cars, Sweden.
    Detterfelt, Jonas
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Introduction of New Materials in the Automotive Industry: A Case Study-Based Framework2021Ingår i: SAE International Journal of Materials & Manufacturing, ISSN 1946-3979, E-ISSN 1946-3987, Vol. 14, nr 1, s. 99-110Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    While new materials are introduced in the automotive industry regularly, there seems to be a lack of generalized frameworks for how to do this efficiently and effectively. Multiple studies have been published on material substitution in a specific component, but the applicability of these to other projects are unclear. Therefore, the authors propose a generalized framework for introduction of new materials in existing production systems in this article. In a study based on three cases in the Swedish automotive industry, the authors have found generalizable insights on challenges and opportunities when introducing new materials that could be converted into a framework for introduction of new materials in the automotive industry. This framework contains both organizational and technological aspects of new material introduction, and is built chronologically from the start of a material strategy framework formulation to the start of a material introduction project.

  • 183.
    Henriksson, Fredrik
    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.
    An outlook on multi material body solutions in the automotive industry – possibilities and manufacturing challenges2016Ingår i: SAE Technical Paper Series, Detroit (MI), USA: Society of Automotive Engineers, 2016Konferensbidrag (Refereegranskat)
    Abstract [en]

    In the automotive industry, mass reduction and lightweight design is a continuing trend that does not show signs of declining. When looking at where to reduce weight in a vehicle, the body is a preferential subsystem due to its large contribution to overall mass and the stability of body composition over a specific model range. The automotive industry of today moves toward a greater differentiation in materials that compose a car, which can be seen in the several different multi material vehicle bodies that have been introduced by manufacturers in recent years. But while mixing materials may contribute to a good compromise between weight reduction and vehicle cost, it also proposes a number of challenges that need to be addressed. Among other material factors, the different coefficients of thermal expansions might introduce new stresses during painting and curing. Joining processes and possible chemical reactions between materials also needs to be taken into account, the same with the question of whether to integrate or differentiate different functions in a system. If the manufacturing plant uses mixed model assembly lines, design of end effectors for gripping multiple different materials is another challenge not previously encountered in this context. In this paper, a number of production and manufacturing related challenges are discussed, and the authors highlight different areas where the requirements of design engineering tools needs to be evaluated for these new multi material concepts and design decisions in order for automotive manufacturers to ensure future market competitiveness.

    Ladda ner fulltext (pdf)
    fulltext
  • 184.
    Henriksson, Fredrik
    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.
    Including Student Case Projects in Integrated Product and Production Development Research – Methodology Description and Discussion2016Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    Within integrated product and production development research, casestudies needto be performed for data gathering purposes. Today, there are two commonly used ways to perform this research; observingindustry projects orhaving the researchers perform the projects themselves. The first option can pose data access and IPRissues, and the second optioncomes with biasing risks. Another approach is to work with studentcaseprojects, givingstudents interesting projects and findinga solution to mediate both data gathering opportunity and biasing risks. This approach has been tested at Linköping University, with students performing projects in the Vinnovafunded Production 2030 –Large Scale Production in Mixed Materials project. Two larger student case projects have been performed on the topic of material substitution and mixed material solutions within the automotive industry.In this paper, the method used to include student projects is presented along with identified benefits and drawbacks. Including student case projects in research have shown to be beneficial in research on processes, projects and methodology, but needs to be complemented by data fromindustry projects and the researcher ́s own work within integrated product and production development in order to create a more reliable analysis with high level of detail.

    Ladda ner fulltext (pdf)
    Including Student Case Projects in Integrated Product and Production Development Research – Methodology Description and Discussion
  • 185.
    Henriksson, Fredrik
    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.
    Integrated Product and Production Research on Introducing Internet of Things in Swedish Wood Industry Products2018Ingår i: Procedia Manufacturing, E-ISSN 2351-9789, Vol. 25, s. 10-16Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    To enable transitioning the Swedish economy into a bioeconomy, Swedish wood industry need to increase added value and introduce new products to market by introducing new technology and improving the product and production development processes. Research in automotive industry have shown the need for integrating product and production development when introducing new technology in existing production systems, and have indicated a possibility of using specifically designed student case projects in order to generate qualitative data. In this paper, one student case project on product and production development in the Swedish wood industry, involving IoT wood products, is presented and evaluated.

    Ladda ner fulltext (pdf)
    fulltext
  • 186.
    Henriksson, Fredrik
    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.
    On Material Substitution in Automotive BIWs – From Steel to Aluminum Body Sides2016Ingår i: 26TH CIRP DESIGN CONFERENCE / [ed] Wang, Lihui; Kjellberg, Torsten, Elsevier, 2016, Vol. 50, s. 683-688Konferensbidrag (Refereegranskat)
    Abstract [en]

    Weight reduction and material substitution are increasing trends in the automotive industry. In this project, the task of substituting the steel body side in the monocoque of a large SUV towards an aluminum body side was investigated through a design engineering approach adopting a breadth-first analysis method. One conclusion based on the analysis is that the choice of joining technology would become arbitrary due to the breadth-first approach. In this paper, the authors present their findings from the aforementioned case, including the challenges with switching between materials with fundamentally different properties when performing material substitution projects. The possibility of having taken a depth-first analysis approach, and the possible effects on the project result, is discussed.

    Ladda ner fulltext (pdf)
    fulltext
  • 187.
    Henriksson, Fredrik
    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.
    Product development in the Swedish Automotive industry: Can design tools be viewed as decision support systems?2015Ingår i: / [ed] Anthony SF Chiu, International Foundation for Production Research (IFPR) , 2015Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    Design engineers working in the automotive industry have to take many design decisions, based on numerous diverse criteria. This results in a high workload of complex decisions. One way to reduce decision complexity and improve decisions could be to improve design tools. Decision support systems (DSSs) have been used in a managerial context to improve decisions. In this article, the authors assess whether design tools generally can be viewed as DSSs. A combination of literature review, surveys and qualitative interviews with seven design engineers was used to assess whether current design tools function as decision supports in product development. Although the specific design context needs to be considered, this study’s results suggest that design tools can generally function as DSSs. In future work, the adaptability to different problem solving patterns needs further in-depth research in the form of individual studies for specific tools in specific contexts.

    Ladda ner fulltext (pdf)
    fulltext
  • 188.
    Henriksson, Fredrik
    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.
    Towards Applying The Boothroyd, Dewhurst and Knight Methodology for Cost Estimation on Fibre Composite Manufacturing - A Theoretical Approach2014Ingår i: Proceedings of The 6th International Swedish Production Symposium 2014 / [ed] Johan Stahre, Björn Johansson, Mats Björkman, Gothenburg, 2014Konferensbidrag (Refereegranskat)
    Abstract [en]

    Increased usage of carbon fibre composite poses challenges for the automotive industry; one is to manage carbon fibre composites within the product development process. This paper combines knowledge in design engineering, material science and production technology, aiming to bridge these domains. The study indicates that mass production methods suitable for carbon fibre have several factors in common with traditional polymer production methods. Thus, it is possible that DfMA methods for traditional polymer production can be adjusted for carbon fibre composite production. The result is summarised in a table aiming to facilitate engineering decisions related to cost estimations for composite moulding.

    Ladda ner fulltext (pdf)
    fulltext
  • 189.
    Henriksson, Fredrik
    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.
    Wever, Renee
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Berry, Patrick
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Fluida och mekatroniska system. Linköpings universitet, Tekniska fakulteten.
    Student-developed laboratory exercises - An approach to cross-disciplinary peer education2016Ingår i: Proceedings of NordDesign 2016: part 2, The Design Society, 2016, s. 226-235Konferensbidrag (Refereegranskat)
    Abstract [en]

    With new technologies and demands from industry, universities need to adapt in order to educate engineers suited for the job market of tomorrow. Focusing on the fields of product development and mechanical engineering, topics such as new lightweight materials and lightweight designs are currently a focus of many industries, and the demand from industry is that engineers graduating should have some knowledge in these fields. In this case, a project was set up for a student-developed laboratory exercise in lightweight material, focusing on the interconnection between material properties, geometry and manufacturing technology in order to fulfil a contextual requirement. The industry chosen was the aircraft industry, due to its heavy emphasis on light weight. The chosen component (a civil aircraft radome) meant that material properties not necessarily connected to high specific strength became important, something that adds educational value to the exercise. Since the introduction of the exercise, the plan is to introduce the laboratory exercise in more courses where the interdisciplinary connections between material properties, geometry and manufacturing technology needs to be explained for students as well as evaluate how this approach to exercise development can be improved and further utilized. This paper presents the learnings from setting up the laboratory exercise, as well as discusses the possibilities of thesis works as an enabler for peer education and puts these in a context for a future, adaptive engineering education that quickly can add or renew material in the curriculum without substantial investment of resources.

  • 190.
    Henriksson, Fredrik
    et al.
    Linköpings universitet, Tekniska fakulteten. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Jonsson, Marie
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Repurposing and production – So what’s the issue? Reflecting on how the production system can be affected by new circular material flows2023Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    On the path towards a circular economy, new ways of making and producing must be implemented on an industrial level. While there are methods for remanufacturing, the topic of repurposing on an industrial scale is still not fully explored and systematized. Repurposing, in this paper defined as the process of re-using products or components but with other functions, or modifying products or components for use in other products, will have a distinct effect on the production system and will challenge the current idea of production system development. In this paper, the authors use four different cases (three implemented in industry, one current design project in an academic-industrial partnership) to reflect on how the production system will be affected by certain aspects of repurposing. In total, five topics of production system development (Material classification, Product definition, Logistics & material handling, Manufacturing processes & planning and Processing window) are highlighted in the analysis, and some concluding remarks about flexibility needs and integrated development processes are presented. This paper does not provide clear answers or methods on how to implement repurposing but highlights multiple areas where further research is needed in order to make repurposing easily accessible and possible to implement for small and medium-sized manufacturers in their regular, daily work.

  • 191.
    Herbertsson, Jonas
    Linköpings universitet, Institutionen för konstruktions- och produktionsteknik, Monteringsteknik. Linköpings universitet, Tekniska högskolan.
    Enterprise Oriented Design for Manufacture: On the adaptation and application of DFM in an enterprise1999Doktorsavhandling, monografi (Övrigt vetenskapligt)
    Abstract [en]

    Efficient manufacturing of products depends not only on the performance of the manufacturing system, but also to a significant extent on product design. Therefore, the concept of Design For Manufacturing (DFM) is being recognised as a critical issue in new product development. In today's highly competitive environment, DFM should be regarded as a strategically important factor for the performance of both product development and manufacturing.

    The theoretical basis for DFM consists of knowledge about relationships between product design parameters and manufacturing parameters. In practice, this knowledge is often applied in the form of design tools and methodologies. However, there are many other aspects of importance that affect the performance of DFM that also must be considered in a manufacturing enterprise.

    This thesis analyses and describes how DFM theory and methodology can be adopted and applied on the basis of a wide perspective of a manufacturing enterprise.

    It is suggested that DFM can be divided into three different activities in the company: preparatory, supporting, and operational DFM. In a large enterprise, it is in the long run important to perform all three of these activities. Operational DFM (DFM performed in a product development project) is highly dependent on the other two DFM activities. Managerial, organisational and design methodological factors must be considered thoroughly when DFM tools are to be introduced in a development organisation, or when the DFM capability is being analysed. It is exceedingly important to create consistency between overall goals and these factors. In the thesis, DFM tools are defined and analysed, and their links to cost estimation and cost management are described. In this context, it appears that a powerful overall strategy for supporting DFM lies in applying target costing and activity based costing approaches using DFM methodology and tools.

    In order to support the development of DFM capability in a company, a framework for an improvement procedure is also described.

  • 192.
    Hermans, Johanna
    et al.
    Department of Production, University of Vaasa, Vaasa, Finland.
    Liu, Yang
    Department of Production, University of Vaasa, Vaasa, Finland.
    Quality management in the new product development: A PPAP approach2013Ingår i: Quality Innovation Prosperity, ISSN 1335-1745, E-ISSN 1338-984X, Vol. 17, nr 2, s. 37-51Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The purpose of this paper is to test Production Part Approval Process (PPAP) as a tool to build quality into the new product and processes and ensure that it meets the customer expectations. Research method is qualitative method using so called case-study to study the suitability of PPAP as a tool for quality management by building quality right into the new product and process. The case studies have been made with three different kinds of companies. PPAP is suitable tool for quality management in NPD processes when taking into account many requirements about personnel, processes, documentation etc. The paper has some limitations such as limited sample size. The results are encouraging managers to use PPAP as a tool for managing their company’s product development processes, quality work and supply chain partnerships. The manner in which the stakeholders could use to facilitate a sense of partnerships or co-workers aiming the same goals rather than have a traditional customer-seller relationship was valued in this study.

    Ladda ner fulltext (pdf)
    fulltext
  • 193.
    Hermansson, Henning
    Linköpings universitet, Institutionen för konstruktions- och produktionsteknik.
    Utveckling av automatiserad rengöringsprocess för tonerkassetter2006Självständigt arbete på avancerad nivå (magisterexamen), 20 poäng / 30 hpStudentuppsats
    Abstract [sv]

    Återtillverkning är ett koncept som får allt större betydelse inom dagens tillverkningsindustri. Konceptet bygger på att uttjänta produkter tas tillbaka och återfår ett marknadsvärde genom en process som innefattar: sortering, rengöring, demontering, bearbetning, montering och testning. Återtillverkning är mer vanlig i USA där metoden använts under många decennier, men mer ovanlig bland svenska företag. Detta är dock någonting som är på väg att förändras i och med hårdare lagstiftningar och en ökad miljömedvetenhet bland företagen.

    I syfte att föra ut kunskap och utforska metodikens för och nackdelar har Linköpings Tekniska Högskola startat ett projekt som går under namnet REKO. Detta examensarbete är det andra som ingår i projektet och är ett samarbete mellan högskolan och Scandi-Toner AB. Företagets återtillverkning av tonerkassetter sker till stora delar genom manuellt arbete. Arbetsmiljön hos företaget är påfrestande, då den är både högljudd och smutsig. Företagsledningen har beslutat att försöka automatisera vissa delar av produktionen.

    Detta examensarbete innefattar framtagning av konceptet för den automatiserade rengöringsprocessen. Kraven var att automationen möjliggör en effektivisering av produktionen men också en förbättrad arbetsmiljö för produktionspersonalen. Framtaget koncept skall passa in i nuvarande produktionssystem, men också ge möjlighet till en förändrings av produktionen i framtiden. Vikten har legat på att hitta ett koncept som skall vara enkel att implementera i Scandi-Toners produktion samtidigt som den skall vara enkel att tillverka och serva.

    Arbetet har resulterat i ett koncept bestående av olika moduler som möjliggör en isolering av toner och absorbering av höga ljudvolymer. Utnyttjandet av transportbana och paletter medger hög flexibilitet och en god möjlighet att förändra produktionsflödet för snabbare bearbetning och bättre överblick av produktionsförloppet.

    Ladda ner fulltext (pdf)
    FULLTEXT01
  • 194.
    Hidalgo-Crespo, José
    et al.
    Grenoble Institute of Technology.
    Riel, Andreas
    Grenoble Institute of Technology.
    Vogt Duberg, Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska fakulteten.
    Bunodiere, Alex
    KU Leuven.
    Golinska-Dawson, Paulina
    Poznan University of Technology.
    An exploratory study for product-as-a-service (PaaS) offers development for electrical and electronic equipment2024Ingår i: Procedia CIRP, E-ISSN 2212-8271, Vol. 122, s. 521-526Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Manufacturing enterprises continue to grapple with transforming from their existing business model, which revolves around designing and selling tangible products, to business models centered on providing a blend of products and services. Product-as-a-Service (PaaS) emerges as a business strategy capable of catalyzing the shift toward higher levels of circularity. However, effecting changes in operational methodologies and value delivery mechanisms is imperative, consequently prompting modifications in the core business strategies of these companies. The objective of this study is to discern and categorize prevailing PaaS business models for electrical and electronic equipment (EEE). The Business Model Canvas (BMC) is introduced as a foundational tool to facilitate this transition, emphasizing the central role of the value proposition within the business model. Additionally, the study underscores the importance of robust take-back systems and repairability in PaaS implementation, particularly within the EEE sector. It highlights the need for novel partnerships, redesigned reverse logistics networks, and efficient product assessment methods to facilitate environmentally responsible decisions. Furthermore, the research evaluates the financial implications of PaaS adoption through Life Cycle Costing (LCC), emphasizing its value in predicting and addressing temporary financial complications, thereby ensuring a smoother transition to service-oriented business models.

  • 195.
    Hillman, Karl
    et al.
    Högskolan Gävle.
    Nilsson, Måns
    SEI.
    Rickne, Annika
    Göteborgs universitet.
    Magnusson, Thomas
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Projekt, innovationer och entreprenörskap. Linköpings universitet, Tekniska högskolan.
    Framework for analysing the governance of sustainable technological innovations2009Konferensbidrag (Refereegranskat)
  • 196.
    Hjelm, Olof
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska fakulteten.
    Lindahl, Mattias
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska fakulteten.
    Roles of Academia in Supporting Eco-Design in Small Companies for Better Environmental and Economic Performance2016Ingår i: 26TH CIRP DESIGN CONFERENCE, ELSEVIER SCIENCE BV , 2016, Vol. 50, s. 745-750Konferensbidrag (Refereegranskat)
    Abstract [en]

    Development and diffusion of new or improved products and services is key to solve sustainability challenges such as climate change, resource depletion and loss of biodiversity. Small firms are important for developing these new solutions, but because of resource constraints they normally have to seek external support from e.g. academia and consultancy firms. This paper discusses how academia can provide such support (e.g. knowledge transfer, assessments and new perspectives) in an effective and efficient manner. To illustrate this, three examples of firms, two monitored over a long period of time, are described using interviews, previous evaluations and project reports for data collection. (C) 2016 The Authors. Published by Elsevier B.V.

    Ladda ner fulltext (pdf)
    fulltext
  • 197.
    Hjertstedt, Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling.
    Ytstrukturer och processer för hårdbearbetning av kugghjul och axlar2008Självständigt arbete på avancerad nivå (magisterexamen), 20 poäng / 30 hpStudentuppsats
    Abstract [sv]

    Detta examensarbete har utförts vid Linköpings universitet i samarbete med Scania Transmission i Södertälje och behandlar kravsättning av ytstrukturer samt processer för hårdbearbetning av kugghjul och axlar. Aktuella artikelritningar innefattar endast krav för Ra-värde, den aritmetiska medelavvikelsen för ytjämnhetsprofilen (R-profilen). Förslag på nya parametrar enligt av Scania tillämpade SS-EN ISO standards har tagits fram, detta för att ge en noggrannare beskrivning av vilken ytstruktur som skall uppnås. Resultatet är generellt tillämpningsbart men fokuseras mot kugghjulens hål, plan och diametrar. Vidare presenteras en jämförelse mellan metoder så att transmissionsverkstäderna kan tillverka kugghjul/axlar på ett kostnadseffektivare sätt. Arbetet grundas på en litteraturstudie av handböcker och standards kompletterat med kartläggning av nuläget genom insamling av mätdata. En omvärldsanalys och några bearbetningsprover med hårdsvarvning har också utförts. Till skillnad från nuläget föreslås en övergång från att ange Ra-värde på ritningarna till att ange en övre gräns för Rz-värde som en begränsning av amplituden. Ytor i relativ rörelse och ytor som ingår i pressförband föreslås kompletteras med en undre gräns för Rz-värde samt en undre gräns för relativ bärighet. Med införandet av ett bärighetskrav ges även en specifikation för profilens fördelning. Angivelse av bearbetningsmetod och eventuellt bearbetningsmönster föreslås att anges i klartext på ritningen då parametrar som beskriver karakteristiska drag för olika bearbetningsmetoder visat sig väldigt variationsbenägna i nulägesanalysen. Jämförelse av hårdbearbetningsmetoder har visat att det i kombinationsmaskiner, hårdsvarvning och slipning, vore intressant att enbart hårdsvarva kugghjulens glidlagerytor, något som enligt bearbetningsprover och omvärldsanalys verkar rimligt. Detta bör efter godkännda riggprover anammas som ett första optimeringssteg. Fler intressanta koncept för framtida bearbetningsalternativ finns att studera i rapportens resultat och diskussionskapitel.

    Ladda ner fulltext (pdf)
    FULLTEXT01
  • 198.
    Hjertstedt Otterström, Oliver
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Package Concept for High Variation Products to Improve Production: Package Development and Implementation to Improve Production of Heavy and High Variation Products2023Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Within the Master’s program in mechanical engineering at Linköping University, this thesis project unfolds in collaboration with Metso Sweden, specifically at their Sala factory. Focused on addressing challenges in packaging processes for Metso’s VASA-line slurry pumps, the project endeavors to devise a concept that not only meets global shipping requirements but also enhances factory output.

    The research unfolds with an exploration of the background, emphasizing the complexities of manufacturing large-scale pumps for heavy-duty industries. Operating in 45 countries with a workforce of approximately 16,000 employees, Metso’s site in Sala specializes in pump production, particularly for the mining industry. The unique nature of slurry pumps, designed to handle liquid solutions containing solid particles, necessitates a tailored approach to packaging.

    The identified problem lies in the high variation of pump configurations, demanding flexibility in production and packaging. Currently, custom-made packages are crafted by experienced operators, who are lacking feedback on their performance. The packaging process involves standard pallets or custom-made packages, with the latter lacking standardization and documentation, introducing uncertainties in transport.

    This study aims to improve overall efficiency at Metso by addressing bottlenecks and knowledge gaps in packaging, focusing on the VASA-line slurry pumps. The goal is to present a concept that aligns with global shipping requirements and has the potential to significantly increase factory output. The findings, supported by production analysis and a detailed implementation plan, estimating a 3.38-fold increase in current production capacity.

    The thesis utilizes production analysis methods in supporting product development and optimizing packaging processes. It further highlights the influence of global shipping requirements on production dynamics, necessitating additional steps in package assembly. With a focus on time rather than costs, this thesis positions itself as a practical guide for enhancing production efficiency within a constrained time frame.

    In summary, this thesis unfolds as an exploration of packaging challenges, offering tangible insights for product development in a production setting and package development, especially in the context of global shipping.

    Ladda ner fulltext (pdf)
    fulltext
  • 199.
    Hochwallner, Martin
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska fakulteten.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten. School of Engineering, Jönköping University, Sweden.
    Automation in Remanufacturing: Applying Sealant on a Car Component2022Ingår i: Advances in Transdisciplinary Engineering, Volume 21 / [ed] Amos H.C. Ng, Anna Syberfeldt, Dan Högberg, Magnus Holm, Amsterdam, The Netherlands: IOS Press, 2022, Vol. 21, s. 147-158Konferensbidrag (Refereegranskat)
    Abstract [en]

    The remanufacturing industry currently relies significantly on manualwork when, for example, sorting and disassembling. Due to several issues, includingprocess time and sequence, operations number, disassembly planning andscheduling, process cost, and performance measurement, it is challenging to staycompetitive. Based on this, it is assumed that more extensive use of robots andautomation in these industries can facilitate higher efficiency and better workconditions. This research paper aims to explore how remanufacturing of carcomponents can be made automatic. The paper describes a case where a specific carcomponent was selected and a specific step in its remanufacturing process exploredfrom the perspective of automating that task. When conducting remanufacturing ofthe selected car component, some machines are used for the testing, cleaning, andgrinding of materials. However, all assembly work is done manually. Incollaboration with the case company, the process step of applying sealant for theassembling of a lid that covers electronic components was selected. Thedemonstrator shows that it is possible to apply sealant with a human-robot layoutwith a good result. One of the advantages of using a robot for this step is that a highquality result was achieved. 

  • 200.
    Hoefnagels, Ric
    et al.
    Universiteit Utrecht.
    Bergek, Anna
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Projekt, innovationer och entreprenörskap. Linköpings universitet, Tekniska högskolan.
    Lako, Paul
    ECN.
    Combined Cycle Gas Turbine (CCGT) Plants2010Ingår i: Technological Learning In The Energy Sector: Lessons for Policy, Industry and Science / [ed] Martin Junginger, Wilfried van Sark, André Faaij, Cheltenham: Edward Elgar Publishing , 2010Kapitel i bok, del av antologi (Övrigt vetenskapligt)
    Abstract [en]

    Technological learning is a key driver behind the improvement of energy technologies and subsequent reduction of production costs. Understanding how and why production costs for energy technologies decline, and whether they will continue to do so in the future, is of crucial importance for policy makers, industrial stakeholders and scientists alike. This timely and informative book therefore provides a comprehensive review of technological development and cost reductions for renewable energy, clean fossil fuel and energy-efficient demand-side technologies. It responds to the need for a quality-controlled data set of experience curves, including assessment of measurement methodology, technological knowledge and associated cost. The expert contributors present a thorough overview and discussion of the pitfalls of applying the experience curve approach, including aspects such as geographical system boundaries, whether the slope of the experience curves is constant or not, statistical error and sensitivity analysis of experience curves, and whether the experience curve approach can be utilized to quantify improvements in energy efficiency. A clear set of recommendations for the use of the experience curve approach is also prescribed. Providing a significant contribution to the current literature on energy and climate models, scenario analysis, and methodological lessons on experience curves, this book will strongly appeal to academics and students in the areas focusing on energy and public sector economics. Policy makers in these fields will also find the book to be of great interest.

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