Solving limited memory influence diagrams

  • Authors:
  • Denis Deratani Mauá;Cassio Polpo de Campos;Marco Zaffalon

  • Affiliations:
  • Istituto Dalle Molle di Studi sull'Intelligenza Artificiale, Manno, Switzerland;Istituto Dalle Molle di Studi sull'Intelligenza Artificiale, Manno, Switzerland;Istituto Dalle Molle di Studi sull'Intelligenza Artificiale, Manno, Switzerland

  • Venue:
  • Journal of Artificial Intelligence Research
  • Year:
  • 2012

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Abstract

We present a new algorithm for exactly solving decision making problems represented as influence diagrams. We do not require the usual assumptions of no forgetting and regularity; this allows us to solve problems with simultaneous decisions and limited information. The algorithm is empirically shown to outperform a state-of-the-art algorithm on randomly generated problems of up to 150 variables and 1064 solutions. We show that these problems are NP-hard even if the underlying graph structure of the problem has low treewidth and the variables take on a bounded number of states, and that they admit no provably good approximation if variables can take on an arbitrary number of states.