Seyed Mohammad hassan Hosseini - Department of Industrial Engineering and Management, Shahrood University of technology, Shahrood, Iran
Atefeh Hazarian - Department of Engineering, Payame Noor University (PNU), Shahre Rey Branch, T ehran, Iran

Supply Chain as a process that requires proper and comprehensive management. The three chains are supply, production and distribution, which require more coordination. The complexity of these issues is such that analytical models of providing a mathematical model and solving precisely these problems are not possible. Therefore, the purpose of this study is to determine the order of optimal supply order suppliers in the supply chain based on fuzzy tops and linear programming. Allocation of orders to suppliers is of great importance in supply chain management. This process comes after the supplier evaluates and chooses. Taking into account the results of the periodicevaluations, the manager assigns orders to the suppliers. The statistical population of this study was 5 suppliers of Iran Khodro Parts. The five suppliers are selected according to the information and documents in Iran Khodro Company and their information is collected and analyzed. In this study, to get closer to real—world conditions, it is assumed that the demand for the product is defined as a triangular fuzzy number.

green supply chain, Iranian Companies, choosing suppliers, multi-objective fuzzy approach