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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

A branch-and-cut approach for the vehicle routing problem with loading constraints

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Hokama, Pedro [1] ; Miyazawa, Flavio K. [1] ; Xavier, Eduardo C. [1]
Total Authors: 3
[1] Univ Estadual Campinas, IC, BR-13084971 Campinas, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: EXPERT SYSTEMS WITH APPLICATIONS; v. 47, p. 1-13, APR 1 2016.
Web of Science Citations: 6

In this paper we describe a branch-and-cut algorithm for the vehicle routing problem with unloading constraints. The problem is to determine a set of routes with minimum total cost, each route leaving a depot, such that all clients are visited exactly once. Each client has a demand, given by a set of items, that are initially stored in a depot. We consider the versions of the problem with two and tri dimensional parallelepiped items. For each route in a solution, we also need to construct a feasible packing for all the items of the clients in this route. As it would be too expensive to rearrange the vehicle cargo when removing the items of a client, it is important to perform this task without moving the other client items. Such packings are said to satisfy unloading constraints. In this paper we describe a branch-and-cut algorithm that uses several techniques to prune the branch-and cut enumeration tree. The presented algorithm uses several packing routines with different algorithmic approaches, such as branch-and-bound, constraint programming and metaheuristics. The careful combination of these routines showed that the presented algorithm is competitive, and could obtain optimum solutions within significantly smaller computational times for most of the instances presented in the literature. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 11/13382-3 - Vehicle routing problem with practical constraints
Grantee:Pedro Henrique Del Bianco Hokama
Support Opportunities: Scholarships in Brazil - Doctorate