Volume 67, Issue 3 pp. 246-261
Research Article

Metaheuristics for a job scheduling problem with smoothing costs relevant for the car industry

Jean Respen

Jean Respen

Geneva School of Economics and Management, GSEM - University of Geneva, Geneva, Switzerland

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Nicolas Zufferey

Corresponding Author

Nicolas Zufferey

Geneva School of Economics and Management, GSEM - University of Geneva, Geneva, Switzerland

Correspondence to: N. Zufferey; e-mail: [email protected]Search for more papers by this author
Edoardo Amaldi

Edoardo Amaldi

Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Milano, Italy

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First published: 28 September 2015
Citations: 17

Abstract

We study a new multiobjective job scheduling problem on nonidentical machines with applications in the car industry, inspired by the problem proposed by the car manufacturer Renault in the ROADEF 2005 Challenge. Makespan, smoothing costs and setup costs are minimized following a lexicographic order, where smoothing costs are used to balance resource utilization. We first describe a mixed integer linear programming (MILP) formulation and a network interpretation as a variant of the well-known vehicle routing problem. We then propose and compare several solution methods, ranging from greedy procedures to a tabu search and an adaptive memory algorithm. For small instances (with up to 40 jobs) whose MILP formulation can be solved to optimality, tabu search provides remarkably good solutions. The adaptive memory algorithm, using tabu search as an intensification procedure, turns out to yield the best results for large instances. © 2015 Wiley Periodicals, Inc. NETWORKS, Vol. 67(3), 246–261 2016

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