A Deterministic Production and Inventory Model for Recycled Material with Weibull Deterioration

초록

Increasing environmental concerns have resulted in efforts for manufacturing companies to recycle, repair, remanufacture, or reuse their products collected from the end user. This study considers recycling (material recovery) system where recycled material is used as raw material for an Economic Production Quantity (EPQ) type production system. It is assumed that the demand of item is deterministic and that a fixed portion of the demand returns to the system. Since the amount of returned material is not enough to meet the demand, additional raw material is procured. The returned material is assumed to deteriorate continuously in accordance with Weibull distribution. We develop a mathematical model with three inventory items, final product, returned material and procured material, with the objective of minimizing the average total cost. Numerical examples are solved to verify theoretical results.

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