Abstract

The performance of dispatching rules is usually tested under various criteria. When due-date criteria are applied, dispatching rules that consider the shop state usually give good results. In this research, the discussion in concentrated on the due-date performance aspect of dispatching rules. Based on an analysis of the relations between the primary factors which affect the due-date performance, a shop state dependent switching rule is proposed. The rule is tested against some other due-date oriented rules under seven kinds of due-date based criteria and is found to be superior to the other rules. Focusing on mean tardiness criterion, further comparison is made with varying degrees of due-date tightness and shop load heaviness, and the proposed rule exhibits obviously better performance than the others.

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