Strategic investment to reduce setup times in the economic lot scheduling problem

Guillermo Gallego and Ilkyeong Moon

Naval Research Logistics (NRL), 1995, vol. 42, issue 5, 773-790

Abstract: This article considers the Economic Lot Scheduling Problem where setup times and costs can be reduced by an initial investment that is amortized over time. The objective is to determine a multiple‐item single facility cyclic schedule to minimize the long run average holding and setup costs plus the amortized investment. We develop a lower bound on the long run average inventory carrying and setup costs as a function of the setup times, and show that this lower bound is increasing concave on the setup times when the out‐of‐pocket setup costs are zero or proportional to the setup times. We then develop a model that may be helpful in deciding the magnitude and the distribution of a one‐time investment in reducing the setup times when the investment is amortized over time. Numerical results based on randomly generated problems, and on Bomberger's ten item problem indicate that significant overall savings are possible for highly utilized facilities. Most of the savings are due to a significant reduction in the long run average holding cost. © 1995 John Wiley & Sons, Inc.

Date: 1995
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https://doi.org/10.1002/1520-6750(199508)42:53.0.CO;2-F

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