Research on gray decision-making approach for the evaluation of the energy efficiency

There are many factors affecting Unit GDP energy consumption, including industrial structure, living habits, energy consuming structure, physical energy efficiency, energy prices and so on. Aggregation approach for interval gray utility value and gray preference order in the group decision-making is studied. This paper first introduced interval gray utility value and interval gray preference order. The weight model for interval gray utility value is proposed. In order to solve the problem of misleading decision-making, the weight distribution model is given according to the error factor. Interval gray preference order is indicated in the form of interval gray utility value and aggregation for uncertain preference order is studied by the use of weight distribution model for interval gray utility value. Then the derived interval gray weights are ranked. The relation degree between the expert preference and the synthesis is introduced to measure the group consistency degree.