Batching work and rework processes with limited deterioration of reworkables

We study the problem of planning the production of new and recovering defective items of the same product manufactured on the same facility. Items of the product are produced in batches. The processing of a batch includes two stages. In the first work stage, all items of a batch are manufactured and good quality items go to the inventory to satisfy given demands. In the second rework stage, some of the defective items of the same batch are reworked. Each reworked item has the required good quality. During waiting for rework, defective items deteriorate. There is a given deterioration time limit. A defective item that is decided not to be reworked or cannot be reworked because it will exceed the deterioration time limit is disposed of immediately after its work operation completes. Deterioration results in an increase in time and cost for performing rework processes. It is assumed that the percentage of defective items is the same in each batch, and that they are evenly distributed in ...

• Type: Journal
• Year: 2006
• Where: COR
• Authors: Karl Inderfurth, Adam Janiak, Mikhail Y. Kovalyov, Frank Werner
• Keywords: COR 2006, Defective Items, Deterioration Time Limit, Reworked