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Annals of Operations Research

, Volume 78, Issue 0, pp 31–50 | Cite as

Solution approaches to hub location problems

  • Sue Abdinnour-Helm
  • M.A. Venkataramanan
Article

Abstract

The hub location problem involves a network of origins and destinations over which transport takes place. Any distribution system falls into this type of category. In this paper, we present a new quadratic integer formulation for the Uncapacitated Hub Location Problem (UHP), which is based on the idea of multi-commodity flows in networks. This new formulation lends itself well for using a branch-and-bound procedure to find optimal solutions. The branch-and-bound procedure is not implemented in a traditional fashion, where bounds are obtained by linearizing the objective function and relaxing the integrality constraints. Instead, a more sophisticated approach is used where bounds are obtained by employing the underlying network structure of the problem. In addition, an artificial intelligence-based technique (Genetic Search) is designed to find solutions quickly and efficiently. The two solution approaches assume that the number of hubs is a variable, each spoke is assigned to a single hub, and all hubs are interconnected. The model and the algorithm can be applied even when all the hubs are not directly linked.

Keywords

Objective Function Network Structure Distribution System Location Problem Solution Approach 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • Sue Abdinnour-Helm
  • M.A. Venkataramanan

There are no affiliations available

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