关键词: 决策试行与评价实验室（DEMATEL）方法, 语言评估标度, 基本信度分配, DSmT组合规则, 三角模糊数

Abstract: There exist two problems in original and improved DEMATEL methods. One is methods may fail under some circumstances for the infinite power of a normalized relation matrix may not converge, and the other is the Dempster rules cannot be used to make direct fusion of experts’ inferences due to the independence of language scales. To solve the above two problems, the experts’ inferences extraction mechanism with the advantage of soft expression is constructed based on language evaluation scales and the basic belief distribution function by taking the DEMATEL improvement method proposed by Lee and Tzeng as the research subject. By introducing DSmT combination rule, the fusion mechanism is suggested which can be used to make effective integration of all experts’ inferences, based on which, the procedures of the new method for improvement of DEMATEL are suggested. The analysis of a simulation case is made to prove the proposed method is more of science and universality.

Key words: Decision Making Trial and Evaluation Laboratory（DEMATEL) method, language assessment scales, basic probability assignment, DSmT combination rule, triangular fuzzy number