The impact of duplicate orders on demand estimation and capacity investment

被引:38
作者
Armony, M [1 ]
Plambeck, EL
机构
[1] NYU, Stern Sch Business, New York, NY 10012 USA
[2] Stanford Univ, Grad Sch Business, Stanford, CA 94305 USA
关键词
maximum-likelihood estimation; duplicate ordering; distribution channels; queueing systems; reneging;
D O I
10.1287/mnsc.1050.0371
中图分类号
C93 [管理学];
学科分类号
12 ; 1201 ; 1202 ; 120202 ;
摘要
Motivated by a $2.2 billion inventory write-off by Cisco Systems, we investigate how duplicate orders can lead a manufacturer to err in estimating the demand rate and customers' sensitivity to delay, and to make faulty decisions about capacity investment. We consider a manufacturer that sells through two distributors. If a customer finds that his distributor is out of stock, then he will sometimes seek to make a purchase from the other distributor; if the latter is also out of stock, the customer will order from both distributors. When his order is filled by one of the distributors, the customer cancels any duplicate orders. Furthermore, the customer cancels all of his outstanding orders after a random period of time. Assuming that the manufacturer is unaware of duplicate orders, we prove that she will overestimate both the demand rate and the cancellation rate. Surprisingly, failure to account for duplicate orders can cause short-term underinvestment in capacity. However, in long-term equilibrium under stable demand conditions the manufacturer overinvests in capacity. Our results suggest that Cisco's write-off was caused by estimation errors and cannot be blamed entirely on the economic downturn. Finally, we provide some guidance on estimation in the presence of double orders.
引用
收藏
页码:1505 / 1518
页数:14
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