A three‐stage approach for the resource‐constrained shortest path as a sub‐problem in column generation

A three‐stage approach for the resource‐constrained shortest path as a sub‐problem in column generation

0.00 Avg rating0 Votes
Article ID: iaor20116231
Volume: 39
Issue: 2
Start Page Number: 164
End Page Number: 178
Publication Date: Feb 2012
Journal: Computers and Operations Research
Authors: ,
Keywords: optimization, networks: path
Abstract:

This paper focuses on the common scenario in which the resource‐constrained shortest path problem (RCSP) on an acyclic graph is a sub‐problem in the context of column generation. It proposes a pseudo‐polynomial time, three‐stage solution approach. Stages 1 (preprocessing) and 2 (setup) are implemented one time to transform RCSP into a shortest path problem, which is solved by stage 3 (iterative solution) at each column generation iteration, each time with different arc costs. This paper analyzes certain properties related to each stage as well as algorithm complexity. Computational tests compare the performances of this method, a state‐of‐the‐art label‐setting algorithm, and CPLEX optimization software on four classes of instances, each of which involves either one or multiple resources, and show that the new method is effective. The new method outperforms the label‐setting algorithm when resource limitations are tight–as can be expected in practice, and outperforms CPLEX for all tested instances. The label‐setting algorithm outperforms CPLEX for all single‐resource RCSP instances and almost all multiple‐resource RCSP instances.

Reviews

Required fields are marked *. Your email address will not be published.