Journal
EUROPEAN JOURNAL OF OPERATIONAL RESEARCH
Volume 302, Issue 1, Pages 259-269Publisher
ELSEVIER
DOI: 10.1016/j.ejor.2021.12.050
Keywords
Routing; Two-dimensional loading constraints; Branch and cut; Contraction algorithm
Funding
- Canadian Natural Sciences and Engineering Research Council (NSERC)
- National Natural Science Foundation of China (NSFC) [52175475, 51775347]
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In this study, a branch-and-cut algorithm is developed for the vehicle routing problem with two-dimensional loading constraints. The algorithm is shown to be competitive through experimental results, and extensive computational analysis is conducted to investigate the impact of different factors on the algorithm.
In this study, we develop a branch-and-cut algorithm for the vehicle routing problem with twodimensional loading constraints. A separation algorithm is proposed to simultaneously identify infeasible set inequalities and weak capacity inequalities for fractional solutions. Classic capacitated vehicle routing problem (CVRP) inequalities are adopted as well. A branch-and-cut (B&C) algorithm is built to solve the problem. Experimental results illustrate that the algorithm is competitive. In particular, we solve 6 instances to optimality for the first time. Extensive computational analysis is also conducted to reveal the impact of infeasible set inequalities, the branching strategy, and the packing algorithms on the B&C algorithm. (c) 2022 Elsevier B.V. All rights reserved.
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