Design an expert system for evaluation and selection supplier

Suitable supplier selection is the most important factor in supplier chain management; so that correct decisions in this phase, caused to reduce costs, make permanent relationship with suppliers and strong competitive strategy in market. In this paper, by reviewing the past articles, important related criteria found and then weighting of criteria and evaluation of alternatives were done with fuzzy Delphi. By ranking the alternatives in fuzzy TOPSIS, five thresholds obtained for grouping in the future. The results that obtained from these computations, converted to knowledge base (KB) of Expert System for Supplier Evaluation (ESSE). The ESSE was designed in Java Expert System Shell (Jess), so that its KB could be updated in the future. To make a user friendly interface, java language was used. The proposed system and experts individually evaluated some sample alternatives and by compare the results, they were very close.