Designing a sustainable supply chain network under sanction conditions

Nowadays, with the advent of the concepts of risk management and sustainability and increasing of social pressures to reduce the negative impacts of industries on the environment and society, it is almost impossible to make strategic decisions such as the supply chain network design (SCND) without considering these concerns. Accordingly, in this paper a general mixed-integer linear programming (MILP) was developed for designing a closed-loop supply chain network, under disruptions conditions and sustainability considerations (focusing on social aspects). This is a multi-echelon, multi-product and multi-modal supply chain network. The sanctions on raw materials (as disruption events) were considered in the mathematical model through planning some scenarios. The most important decision variables in this model are related to: supplier selection, quantity of each raw material, facilities location, products flow between different facilities and transportation modes. Finally, designing a closed-loop supply chain network in Iran's tire industry was taken as a real world case study to demonstrate the applicability and effectiveness of the proposed model. In addition, the sensitivity analysis on some of the important parameters was carried out.