PLANNING A MODEL FOR SUPPLIER SELECTION WITH AHP AND GREY SYSTEMS THEORY (A case study in a cement manufacturing company)

Supply Chain Management (SCM) is one of factors playing important rule in receiving company to their objectives, so as increasing customer satisfaction, gaining more share of market, presentation goods and services just in time and etc. In real, we can assert that supply chain management is more effective in companiessuccess, and if companies not enough attending to this important factor, they have difficult way in achieving to success and presentment in the competition market. Nowadays, increment number of goods and services suppliers with different logos and characteristics, shows importance of supplier evaluation and selection using scientific and logical methods more than past. In this paper, Analytical hierarchy process and grey system theory are used to proposing a model for evaluating suppliers. Type of decision in a proposed model is a group decision making that this group is selected from experts. The proposed grey AHP model applied to a real case study for cement manufacturing company in Iran. The results shown in conditions that decision makers don’thave complete information about the criteria or opinions of experts are so various, this model able to evaluate suppliers carefully.