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Relaxations of Weakly Coupled Stochastic Dynamic Programs

Author

Listed:
  • Daniel Adelman

    (Graduate School of Business, University of Chicago, Chicago, Illinois 60637)

  • Adam J. Mersereau

    (Kenan-Flagler Business School, University of North Carolina, Chapel Hill, North Carolina 27599)

Abstract

We consider a broad class of stochastic dynamic programming problems that are amenable to relaxation via decomposition. These problems comprise multiple subproblems that are independent of each other except for a collection of coupling constraints on the action space. We fit an additively separable value function approximation using two techniques, namely, Lagrangian relaxation and the linear programming (LP) approach to approximate dynamic programming. We prove various results comparing the relaxations to each other and to the optimal problem value. We also provide a column generation algorithm for solving the LP-based relaxation to any desired optimality tolerance, and we report on numerical experiments on bandit-like problems. Our results provide insight into the complexity versus quality trade-off when choosing which of these relaxations to implement.

Suggested Citation

  • Daniel Adelman & Adam J. Mersereau, 2008. "Relaxations of Weakly Coupled Stochastic Dynamic Programs," Operations Research, INFORMS, vol. 56(3), pages 712-727, June.
    • Handle: RePEc:inm:oropre:v:56:y:2008:i:3:p:712-727
    DOI: 10.1287/opre.1070.0445
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    References listed on IDEAS

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