关键词: 供应商选择, 双层规划, 熵权法, 分层迭代算法

Abstract: In order to reduce the procurement cost of produce and improve the service quality of the supplier，a bi-level programming model is designed to describe the game relationship between manufacturing and supplier，the upper-level objective function determines the total procurement cost which should be minimized，the lower-level objective function is supplier’s total service quality which should be maximized，in which measuring supplier’s service quality is presented as comprehensive evaluation scores，through the method of entropy method，the weight of influencing factors is gained，and multiplied the influencing factors’ value of the suppliers，the comprehensive evaluation scores of each subcontract supplier is gained.Finally，combination with the model features bi-level iterative algorithm is designed.

Key words: supplier selection, bi-level programming, entropy method, bi-level iterative algorithm