A Heuristic for Near-Optimal Troubleshooting Using AO*
Warnquist, Håkan Nyberg, Mattias
2008 (English)In: Proceedings of the International Workshop on the Principles of Diagnosis, 2008Conference paper (Refereed)
When troubleshooting malfunctioning technical equipment, the task is to locate faults and make repairsuntil the equipment functions properly again. The AO* algorithm can be used to find troubleshootingstrategies that are optimal in the sense that the expected cost of repair is minimal. We have adaptedthe AO* algorithm for troubleshooting in the automotive domain with limited time. We propose a newheuristic based on entropy. By using this heuristic, near-optimal strategies can be found within a fixedtime limit. This is shown in empirical studies on a fuel injection system of a truck. In these results, theAO* algorithm using the new heuristic, performs better than other troubleshooting algorithms.
National CategoryEngineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-51208OAI: oai:DiVA.org:liu-51208DiVA: diva2:273340