Discrete-item inventory control involving unknown censored demand and convex inventory costs

Document Type

Article

Publication Date

1-1-2023

Abstract

We study inventory control involving lost sales and hence censored demand. In a long-run average framework, the demand distribution is largely unknown. As long as the stationary inventory costs are strictly convex to the extent that the second lost item costs strictly more than the first one, the regret would be (Formula presented.). Our discrete-item setting has rendered the presence or absence of strong censoring indicators or equivalently, being knowledgeable or ignorant of one more demand request after the depletion of the inventory, a critical issue and any gradient-based method designed for the continuous-item case ineffective. We propose a policy that deliberately orders up to very high levels in designated learning periods and in the remaining doing periods, uses base-stock levels tailored to near-empirical distributions formed over the learning periods. A matching (Formula presented.) upper bound can be achieved by this policy. The results can hold even when items are nonperishable. Numerical experiments further illustrate the relative competitiveness of our separate learning-doing policy.

Identifier

85137201457 (Scopus)

Publication Title

Production and Operations Management

External Full Text Location

https://doi.org/10.1111/poms.13824

e-ISSN

19375956

ISSN

10591478

First Page

45

Last Page

64

Issue

1

Volume

32

Grant

22-TMTSD-NJ-0003

Fund Ref

U.S. Department of Agriculture

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