Özet:

In this study, a production planning problem in which a producer remanufactures returned products into serviceable products besides manufacturing serviceable products is considered. The main challenge in this planning problem is the uncertain demand for the serviceable products and the uncertain returns of the used products. The probability distributions of the uncertain demand and uncertain returns are not known. Only the means of uncertain parameters and maximum deviations from these means are known or can be estimated. The problem is to determine the quantity of serviceable products that are manufactured, the quantity of returned products that are remanufactured, and the quantity of returned products that are disposed over a multi-period planning horizon such that total cost composed of production, inventory and disposal costs is minimized. A new robust linear programming model that yields a feasible production-disposal policy regardless of the realization of demand and returns is proposed and compared with a robust linear programming model existing in the literature. The computational results reveal that the proposed model significantly outperforms the one existing in literature in terms of the actual cost savings

Anahtar Kelimeler: