DISPATCHING RULES IN SCHEDULING - A FUZZY APPROACH

Job-shop scheduling through simulation uses various kinds of dispatchi ng rules such as SPT or the slack time rule. Each of these rules aims at satisfying a single criterion although workshop management is a mul ti-criteria problem. This paper proposes a way to use fuzzy logic in o rder to build aggregated rules allowing to obtain a compromise between the satisfaction of several criteria. When the criteria of performanc e change with the evolution of the production environment, these aggre gated rules can be parametrized in order to modify the respective infl uence of the elementary rules they are composed of.