Dynamic operator assignment based on shifting machine loading

Dynamic operator assignment based on shifting machine loading

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Article ID: iaor20012103
Country: United Kingdom
Volume: 38
Issue: 14
Start Page Number: 3403
End Page Number: 3420
Publication Date: Jan 2000
Journal: International Journal of Production Research
Authors: ,
Keywords: production, simulation: applications
Abstract:

This study proposes a way to improve the efficiency of semiconductor wafer fabrications by better allocating operator resources. A semiconductor wafer fabrication facility produces multiple products using unreliable machines, and each product follows a different route. Random machine failures and demand fluctuations make machine loading change from time to time. Thus, the operator assignment needs adjustment accordingly to maintain a high factory throughput rate. We propose methods to make this dynamic adjustment. By using simulation models, we demonstrate that proportionally allocating operators among all work stations based on their utilization requirements can improve overall factory efficiency. We also show that frequent short term dynamic allocation of operators produces more output than conventional long term static allocation.

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