This paper proposed a new method for supplier evaluation and selection after analysing the supplier state evolutionary process according to the entropy change process in the thermodynamics. In order to verify the feasibility of the new proposed method, we applied it to a maintenance, repair and overhaul/operation enterprise. Besides, we analysed the characteristics and problems of the maintenance, repair and overhaul/operation industry firstly, and then established an index system and calculated weights by balanced scorecard and analytic network process respectively. The results calculated by the proposed method are proved to be in accordance with the reality.

Abstract-this paper proposed a comprehensive loss reduction evaluation method for regional distribution grids based on G 1 method and grey relational analysis (GRA). The method is good at avoiding the prominent disadvantages of analytic hierarchy process (AHP) by determining the weights of evaluation indices. Otherwise, the method of grey relational analysis was used for dimensionless processing. Therefore, the authors put forward an implementation scheme about the preferred area for loss reducing and the optimal index, which is proved to be practical, significant, and applicable.