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Chapter 8
DOI: 10.4018/978-1-4666-9644-0.ch008
ABSTRACT
This chapter addresses the family of problems known in the literature as Capacitated Vehicle Routing
Problems (CVRP). A procedure is introduced for the optimization of a version of the generic CVRP. It
generates feasible clusters and, in a first step, yields a coding of their ordering. The next stage provides
this information to a genetic algorithm for its optimization. A selective pressure process is added in order
to improve the selection and subsistence of the best candidates. This arrangement allows improving the
performance of the algorithm. We test it using Van Breedam and Taillard’s problems, yielding similar
results as other algorithms in the literature. Besides, we test the algorithm on real-world problems, cor-
responding to an Argentinean company distributing fresh fruit. Four instances, with 50, 100, 150 and
200 clients were examined, giving better results than the current plans of the company.
INTRODUCTION
The competitive pressures faced by companies pushes for the development of new techniques for opti-
mal decision-making. These methods are also intended to be fast enough to achieve highly competitive
services. One of the main issues that such techniques should address is the design of plans for the dis-
tribution of products. The high complexity of these problems constitutes a roadblock for the creation of
A Genetic Algorithm’s
Approach to the Optimization
of Capacitated Vehicle
Routing Problems
Mariano Frutos
Universidad Nacional del Sur, Argentina & CONICET, Argentina
Fernando Tohmé
Universidad Nacional del Sur, Argentina & CONICET, Argentina
Fabio Miguel
Universidad Nacional de Río Negro, Argentina