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Setting inventory levels of CONWIP flow lines via linear programming

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  • Helber, Stefan
  • Schimmelpfeng, Katja
  • Stolletz, Raik

Abstract

This paper treats the problem of setting the inventory level of closed-loop flow lines operating under the constant-work-in-process (CONWIP) protocol. We solve a huge but simple linear program that models an entire simulation run of a closed-loop flow line in discrete time to determine a production rate estimate of the system. This new approach has been introduced in Helber et al. (2008) for open flow lines with limited buffer capacities. In this paper we present numerical results of the method for closed-loop CONWIP flow lines. The first part of the numerical study deals with the accuracy of the method. In the second part, we focus on the relationship between the CONWIP inventory level and the short-term profit. In our numerical investigation we consider both limited and unlimited local buffer capacities between the machines.

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Bibliographic Info

Paper provided by Leibniz Universität Hannover, Wirtschaftswissenschaftliche Fakultät in its series Hannover Economic Papers (HEP) with number dp-436.

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Length: 26 pages
Date of creation: Dec 2009
Date of revision:
Handle: RePEc:han:dpaper:dp-436

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Related research

Keywords: CONWIP; flow lines; random processing times; performance evaluation; buffer allocation; linear programming; simulation.;

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  1. Helber, Stefan & Schimmelpfeng, Katja & Stolletz, Raik & Lagershausen, Svenja, 2008. "Using linear programming to analyze and optimize stochastic flow lines," Hannover Economic Papers (HEP) dp-389, Leibniz Universität Hannover, Wirtschaftswissenschaftliche Fakultät.
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