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Estimating process batch flow times in a two-stage stochastic lowshop with overlapping operations

  • VAN NIEUWENHUYSE, Inneke
  • VANDAELE, Nico
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    This paper focuses on modelling the impact of lot splitting on average process batch flow times, in a two-stage stochastic flowshop. It is shown that the traditional queueing methodology for estimating flow times cannot be directly applied to a system with lot splitting, as the arrival process of sublots at the second stage is not a renewal process. Consequently, an embedded queueing model is developed in order to approximate the average flow time of the flags through the system; from the flow time of the flags, the flow time of process batches can then be derived. The model turns out to yield very satisfactory results, and provides a tool to quantify the reduction in flow time that can be obtained by overlapping operations at different processing stages. Moreover, it allows to model the trade-off between flow time improvement and gap time occurrence by using it within the scope of a cost model.

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    Paper provided by University of Antwerp, Faculty of Applied Economics in its series Working Papers with number 2005009.

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    Length: 22 pages
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    Handle: RePEc:ant:wpaper:2005009
    Contact details of provider: Postal: Prinsstraat 13, B-2000 Antwerpen
    Web page: https://www.uantwerp.be/en/faculties/applied-economic-sciences/
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