Fill rate of single-stage general periodic review inventory systems
نویسندگان
چکیده
We consider a single-stage inventory system supplying external demands and receiving stocks from an ample supply. Time is divided into periods of xed length; a period can be a day or a week depending on the situation. In each period, demands arrive and are either lled or backlogged. The system operates under a general periodic-review base-stock policy. Under this policy, the inventory position (de ned as amount on-hand + on-order backlog) is reviewed once every R periods. If the inventory position is below a base-stock level , an order is placed to raise the inventory position back to . An order placed at the beginning of a review period t is delivered at the beginning of period t + L (L and R are positive integers). Random demand occurs after the order placed L periods ago arrives in a period. The demands in di¤erent periods are assumed to be independent and identically distributed. All excess demands are backlogged. The inventory system we study in this paper is widely used in practice and is discussed under the names FixedTime Period Models [6], Periodic Review (P) Systems [9], and so on in popular introductory operations management textbooks. When R = 1, the general periodic review policy becomes the well studied periodic-review base-stock policy in the research literature. This paper studies the systems ll rate, the long-run average fraction of demand satis ed immediately using on-hand stocks. We develop a formula for the exact ll rate for general demand Corresponding author. Tel: +1 972 883 6288; fax: +1 972-883-2089. Email address: [email protected].
منابع مشابه
A numerical study of expressions for fill rate for single stage inventory system with periodic review
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ورودعنوان ژورنال:
- Oper. Res. Lett.
دوره 35 شماره
صفحات -
تاریخ انتشار 2007