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EfficientIDC : A Faster Incremental Dynamic Controllability Algorithm
Linköping University, Department of Computer and Information Science, Artificial Intelligence and Intergrated Computer systems. Linköping University, The Institute of Technology. ORCID iD: 0000-0002-2849-3316
Linköping University, Department of Computer and Information Science, Artificial Intelligence and Intergrated Computer systems. Linköping University, The Institute of Technology. ORCID iD: 0000-0002-5500-8494
Linköping University, Department of Computer and Information Science, Artificial Intelligence and Intergrated Computer systems. Linköping University, The Institute of Technology.
2014 (English)In: Proceedings of the 24th International Conference on Automated Planning and Scheduling (ICAPS), 2014, 199-207Conference paper (Refereed)
Abstract [en]

Simple Temporal Networks with Uncertainty (STNUs) allow the representation of temporal problems where some durations are uncontrollable (determined by nature), as is often the case for actions in planning. It is essential to verify that such networks are dynamically controllable (DC) – executable regardless of the outcomes of uncontrollable durations – and to convert them to an executable form. We use insights from incremental DC verification algorithms to re-analyze the original verification algorithm. This algorithm, thought to be pseudo-polynomial and subsumed by an O(n5) algorithm and later an O(n4) algorithm, is in fact O(n4) given a small modification. This makes the algorithm attractive once again, given its basis in a less complex and more intuitive theory. Finally, we discuss a change reducing the amount of work performed by the algorithm.

Keyword [en]
Temporal Networks, Dynamic Controllability, Incremental Algorithm
National Category
Computer Science
Identifiers
URN: urn:nbn:se:liu:diva-103012ISBN: ISBN:978-1-57735-660-8OAI: oai:DiVA.org:liu-103012DiVA: diva2:685363
Conference
24th International Conference on Automated Planning and Scheduling (ICAPS 2014), 21-26 June 2014, Portsmouth, USA
Projects
CUASCADICSNFFP6SherpaELLIIT
Funder
Swedish Research CouncileLLIIT - The Linköping‐Lund Initiative on IT and Mobile CommunicationsSwedish Foundation for Strategic Research EU, FP7, Seventh Framework ProgrammeVinnova
Available from2014-01-09 Created:2014-01-09 Last updated:2014-08-04

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Nilsson, MikaelKvarnström, JonasDoherty, Patrick
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