Constraint-Based Job Shop Scheduling with {\sc Ilog\ Scheduler}

  • Authors:
  • Wim Nuijten;Claude Le Pape

  • Affiliations:
  • ILOG S.A., 9 Rue de Verdun, BP 85, F-94253 Gentilly Cedex, France/ url: http://www.ilog.fr. E-mail: nuijten@ilog.fr;Bouygues-Direction Scientifique, 1 Avenue Eugene Freyssinet, F-78061 Saint Quentin en Yvelines, France. E-mail: lepape@dmi.ens.fr

  • Venue:
  • Journal of Heuristics
  • Year:
  • 1998

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Abstract

We introduce constraint-based scheduling and discuss its main principles. An approximation algorithm based on tree search is developed for the job shop scheduling problem using {\sc Ilog\ Scheduler}. A new way of calculating lower bounds on the makespan of the job shop scheduling problemis presented and we show how such results can be used within a constraint-based approach. An empirical performance analysis shows that the algorithm we developed performs well. Finally, taking the job shop scheduling problem as a start point, we discuss how constraint-based scheduling can beused to solve more general scheduling problems.