Troubleshooting when Action Costs are Dependent with Application to a Truck Engine

  • Authors:
  • Håkan Warnquist;Mattias Nyberg;Petter Säby

  • Affiliations:
  • Service Methods Framework Development, Scania, SE-151 87 Södertälje, Sweden;Department of Electrical Engineering, Linköping University, SE-581 83 Linköping, Sweden;Service Methods Framework Development, Scania, SE-151 87 Södertälje, Sweden

  • Venue:
  • Proceedings of the 2008 conference on Tenth Scandinavian Conference on Artificial Intelligence: SCAI 2008
  • Year:
  • 2008

Quantified Score

Hi-index 0.01

Visualization

Abstract

We propose a troubleshooting algorithm that can troubleshoot systems with dependent action costs. When actions are performed they may change the way the system is decomposed and affect the cost of future actions. We present a way to model this by extending the traditional troubleshooting model with an additional state that describes which parts of the system that are decomposed. The proposed troubleshooting algorithm searches an AND/OR graph with the aim of finding the repair plan that minimizes the expected cost of repair. We present the heuristics needed to speed up the search and make it competitive with other troubleshooting algorithms. Finally, the performance of the algorithm is evaluated on a probabilistic model of a fuel injection system of a truck. We show that the expected cost of repair can be reduced when compared with an algorithm from previous literature.