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  • Thurer_et_al_IJPR_2014_Cont_OR

    Rights statement: The final, definitive version of this article has been published in the Journal, International Journal of Production Research, 55 (22), 2014, © Informa Plc

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Continuous workload control order release revisited: an assessment by simulation

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<mark>Journal publication date</mark>2014
<mark>Journal</mark>International Journal of Production Research
Issue number22
Volume55
Number of pages17
Pages (from-to)6664-6680
Publication statusPublished
Early online date15/04/14
Original languageEnglish

Abstract

Order release is a key component of the Workload Control concept. Jobs do not enter the shop floor directly – they are retained in a pre-shop pool and released in time to meet due dates while keeping work-in-process within limits or norms. There are two important groups of release methods: continuous methods, for which the workload falling to a specified level can trigger a release at any moment in time; and, periodic release methods, for which releases take place at fixed intervals. Continuous release methods in general have been shown to outperform periodic release methods. Yet, there is incongruence in the results presented in the literature on the relative performance of the various continuous release methods. We use a job shop simulation model to examine the performance of continuous release methods from the literature and find that the contradictory results are explained by the different rules applied to sequence jobs in the pool – a factor neglected in previous work. Finally, a new breed of continuous release methods has recently emerged, but these have not been compared with prior approaches. Therefore, we also examine these methods and show that they significantly improve overall performance, although this is to the detriment of jobs with large processing times.

Bibliographic note

The final, definitive version of this article has been published in the Journal, International Journal of Production Research, 55 (22), 2014, © Informa Plc