An EPQ model with imperfect items using interval grey numbers

Erdal Aydemir, Fevzi Bedir, Gultekin Ozdemir, Abdullah Eroglu

Abstract


The classic economic production quantity (EPQ) model has been widely used to determine the optimal production quantity. However, the analysis for finding an EPQ model has many weaknesses which lead many researchers and practitioners to make extensions in several aspects on the original EPQ model. The basic assumption of EPQ model is that 100% of manufactured products are non-defective that is not valid for many production processes generally.

The purpose of this paper is to develop an EPQ model with grey demand rate and cost values with maximum backorder level allowed with the good quality items in units under an imperfect production process. The imperfect items are considered to be low quality items which are sold to a particular purchaser at a lower price and, the others are reworked and scrapped. A mathematical model is developed and then an industrial example is presented on the wooden chipboard production process for illustration of the proposed model.

 


Keywords


EPQ; Grey System Theory; Inventory Management; Rework, Imperfect Items

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DOI: http://dx.doi.org/10.11121/ijocta.01.2015.00204

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Copyright (c) 2015 Erdal Aydemir, Fevzi Bedir, Gultekin Ozdemir, Abdullah Eroglu

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