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Workload control and order release in two-level multi-stage job shops:an assessment by simulation

By Matthias Thuerer, Mark Stevenson, Cristovao Silva, Martin Land and Moacir Godinho Filho

Abstract

<p>Most studies on the performance of workload control (WLC) order release methods assume products have simple structures. But, in practice, products are often complex and consist of a number of sub-assemblies that flow through a level 1 job shop before converging on several final assembly operations in a level 2 assembly shop. Evaluating the performance of release methods in this context referred to as the two-level multi-stage job shop is an important step towards improving the alignment between WLC theory and practice. We use simulation to assess the performance of four of the best-performing WLC order release methods. Results suggest that WLC order release has the potential to limit work-in-process (WIP) while reducing the percentage of tardy jobs. It is also important to consider when and where release should be controlled. Results suggest that: (1) orders should be considered for release to level 2 when the first sub-assembly is complete, rather than only when all of the sub-assemblies that make up an assembly order are complete at level 1; and, (2) exercising control at level 2 (with or without control at level 1) leads to a greater reduction in the percentage of tardy jobs than control at level 1 only.</p>

Topics: controlled order release, multi-stage job shop; workload control (WLC); simulation; ORIENTED MANUFACTURING CONTROL; CONTROL METHODOLOGY; REVIEW/RELEASE; PERFORMANCE; MANAGEMENT; ISSUES; RULES
Year: 2013
DOI identifier: 10.1080/00207543.2012.676685
OAI identifier: oai:pure.rug.nl:publications/09bf7e89-8a2d-4938-bbe8-c545c3793c73
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