Using Logic-Based Benders Decomposition to Solve the Capacity-and Distance-Constrained Plant Location Problem

  • Authors:
  • Mohammad M. Fazel-Zarandi;J. Christopher Beck

  • Affiliations:
  • Rotman School of Management, University of Toronto, Toronto, Ontario M5S 3E6, Canada;Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario M5S 3G8, Canada

  • Venue:
  • INFORMS Journal on Computing
  • Year:
  • 2012

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Abstract

We address an optimization problem that requires deciding the location of a set of facilities, the allocation of customers to those facilities under capacity constraints, and the allocation of customers to trucks at those facilities under truck travel-distance constraints. We present a hybrid approach that combines integer and constraint programming using logic-based Benders decomposition. Computational experiments demonstrate that the Benders model is able to find and prove optimal solutions up to three orders-of-magnitude faster than an existing integer programming approach; it also finds better feasible solutions in less time when compared with an existing tabu search algorithm.