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The Use of Versatile Distribution Families in Some Stochastic Inventory Calculations
John F. Kottas and Hon-Shiang Lau
The Journal of the Operational Research Society
Vol. 31, No. 5 (May, 1980), pp. 393-403
Stable URL: http://www.jstor.org/stable/2581188
Page Count: 11
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Previous works on stochastic inventory problems have often assumed that an item's lead time demand follows a "convenient" distribution such as the normal, the γ or the Weibull. First, this paper argues that these convenient distributions may be overly restrictive and unrealistic, and points out the versatility and realism of using four-parameter distributions of the Pearson's and the Schmeiser-Deutsch's systems. Second, using these four-parameter distributions, this paper presents practical `manual" methods for computing the stock-out probability, reorder level and expected lost sales of an inventory item and for solving the lot-size reorder-point model. Some of these methods are actually simpler than the ones developed previously for the more restrictive distributions.
The Journal of the Operational Research Society © 1980 Operational Research Society