Complete Closed-loop Supply Chain Network Design under Uncertainty of Demand and Return Products

Abstract

In this research, we focus on complete closed loop supply chain, which includes forward and backward flows of materials. So a network has been considered including suppliers, manufacturers, distributers, customers, and collecting and disposal centers. In addition, to conform to real word conditions, and examine uncertainty of demands returns, scenario technic was used. In this research, we used a mixed integer linear programming model to minimize total cost of supply chain. The location of the facility, the production quantity of different products in each sites, and the flow of products between different nodes of network are the decision variables of the model. The computational complexity of the model, leads us to develop a particle swarm optimization algorithm to solve the problem in large-scale cases. Results show the efficiency of proposed algorithm in uncertain situations.