Please use this identifier to cite or link to this item: https://hdl.handle.net/10419/246391 
Year of Publication: 
2019
Citation: 
[Journal:] Operations Research Perspectives [ISSN:] 2214-7160 [Volume:] 6 [Publisher:] Elsevier [Place:] Amsterdam [Year:] 2019 [Pages:] 1-11
Publisher: 
Elsevier, Amsterdam
Abstract: 
We present inventory models to schedule an imperfect manufacturing process where a proportion of the items are defective. The proportion is known; and the production is followed by a 100% inspection. The manufacturer implements a rework strategy to rectify the defective items. Since the rework can be implemented on a number of plans, a flexible rework rate is presented. The flexible rework offers the manufacturer the selection of the rework rate, which can be different from the production rate, and also the selection of the rework process itself, which can be asynchronous and synchronous. Under the asynchronous rework, the defective items are kept until the completion of the production lot; while, under the synchronous rework, the defective items are reworked as soon as they are produced. A linear rework cost function of the rework rate is assumed. The objective of this paper is to develop mathematical models to determine the optimal lot sizes and backorders for different assumptions about the rework rate and the rework process. It has been proven that the rework strategy and the rework rate influence the lot size and the backorder, especially for large values of the defective proportion.
Subjects: 
Inventory
Economic production quantity
Backorder
Imperfect quality
Flexible rework
Persistent Identifier of the first edition: 
Creative Commons License: 
cc-by-nc-nd Logo
Document Type: 
Article

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