Ordering policies for inventory systems with expediting

Chi Chiang*

*Corresponding author for this work

Research output: Contribution to journalArticle

7 Scopus citations


Most studies in the inventory literature assume either no expediting or placing an additional order in the case of an emergency. However, many companies do expedite orders or shipments. In this paper, we propose two continuous-review single-item policies when expediting is allowed. The first is a modified Allen and D'Esopo's model when expediting is possible before a threshold time point, while the second is a heuristic policy when an expediting decision can be made at a certain time point during the lead time. We also devise a simple tabulation algorithm to find the optimal operational parameters. Computational results show that the proposed policies perform better than the ordinary no-expediting model, especially when the service level is high.

Original languageEnglish
Pages (from-to)1291-1295
Number of pages5
JournalJournal of the Operational Research Society
Issue number11
StatePublished - 1 Nov 2002


  • Inventory
  • Lead time
  • Service level

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