Document Type



A considerable amount of electronic products are returned after sales, especially in such an economic downturn situation. After repair and refurbishment, the used products can be returned into the markets which fulfill the forward supply chains into a close loop. In this paper, we consider the service parts planning in the beginning of product rolling plan together with the sales through quantities to minimize the inventory level in the period of product lifecycle. A Petri Net is used to model a simple closed-loop supply chain with shared sales information. PUSH and PULL inventory policies are used in this research. Finally, it is investigated how a third party service provider uses this mechanism to improve the accuracy of inventory planning.