关键词: 绿色供应商, 梯形模糊软集, 信息集结

Abstract:  For the problem of green supplier selection considering experts’ evaluation information, the multi-criteria group decision model for green supplier selection based on trapezoidal fuzzy soft sets is proposed. Firstly, the different evaluation sets are selected by each expert and the linguistic variables are used for evaluation. Moreover, the“and”operation is applied to aggregate experts’ evaluation information, and the information integrated trapezoidal fuzzy soft set is obtained. Secondly, the obtained trapezoidal fuzzy soft set is as initial decision-matrix in multiple attribute decision making. The optimal decision can be obtained by calculating ideal distance from positive-ideal solution and negative-ideal solution and the relative closeness based on the weighted normalized trapezoidal fuzzy soft sets. Finally, an illustrative example is given to demonstrate the feasibility and practicability of the proposed method.

Key words: green supplier, trapezoidal fuzzy soft sets, information aggregation