关键词: 群决策, 熵, 属性权重, 灰色关联, 决策者权重

Abstract: This paper proposes a ranking approach to multi-attribute group decision making where individual assessments are provided as interval-valued intuitionistic fuzzy numbers, and the information of attribute weight and the experts’ weight are unknown. To solve the attribute weight, starting from the geometric meaning of interval-valued intuitionistic fuzzy numbers, a reasonable method is developed and the attribute weight is achieved. Then, it aggregates the attribute value of each method. Based on the maximum entropy model under the constrains of grey relation degree between the optimal project and every one, experts’ weight is obtained. Finally, an aggregation approach of group decision making with interval grey numbers is presented and the comprehensive evaluations are obtained. A practical example is provided to verify the effectiveness of the developed approach.

Key words: group decision making, entropy, attributes&rsquo, weights, grey relational degree, decision makers&rsquo, weights