Scheduling with memetic algorithms over the spaces of semi-active and active schedules

  • Authors:
  • Miguel A. González;Camino R. Vela;Ramiro Varela

  • Affiliations:
  • Artificial Intelligence Center, University of Oviedo, Spain;Artificial Intelligence Center, University of Oviedo, Spain;Artificial Intelligence Center, University of Oviedo, Spain

  • Venue:
  • ICAISC'06 Proceedings of the 8th international conference on Artificial Intelligence and Soft Computing
  • Year:
  • 2006

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Abstract

The Job Shop Scheduling Problem is a paradigm of Constraint Satisfaction Problems that has interested to researchers over the last decades. In this paper we confront this problem by means of a Genetic Algorithm that is hybridized with a local search method. The Genetic Algorithm searches over the space of active schedules, whereas the local search does it over the space of semi-active ones. We report results from an experimental study over a set of selected problem instances showing that this combination of search spaces is better than restricting both algorithms to search over the same space. Furthermore we compare with the well-known Genetic Algorithms proposed by D. Mattfeld and the Branch and Bound procedure proposed by P. Brucker and obtain competitive results.