Evolving Parameterised Policies for Stochastic Constraint Programming

  • Steven Prestwich
  • S. Armagan Tarim
  • Roberto Rossi
  • Brahim Hnich
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5732)

Abstract

Stochastic Constraint Programming is an extension of Constraint Programming for modelling and solving combinatorial problems involving uncertainty. A solution to such a problem is a policy tree that specifies decision variable assignments in each scenario. Several solution methods have been proposed but none seems practical for large multi-stage problems. We propose an incomplete approach: specifying a policy tree indirectly by a parameterised function, whose parameter values are found by evolutionary search. On some problems this method is orders of magnitude faster than a state-of-the-art scenario-based approach, and it also provides a very compact representation of policy trees.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Steven Prestwich
    • 1
  • S. Armagan Tarim
    • 2
  • Roberto Rossi
    • 3
  • Brahim Hnich
    • 4
  1. 1.Cork Constraint Computation CentreUniversity College CorkIreland
  2. 2.Operations Management DivisionNottingham University Business SchoolNottinghamUK
  3. 3.Logistics, Decision and Information Sciences GroupWageningen URThe Netherlands
  4. 4.Faculty of Computer ScienceIzmir University of EconomicsTurkey

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