Research on interval grey preference information aggregation approach

The preference information aggregation approach of the interval grey preference order, interval grey utility value, and interval grey number reciprocal comparison matrix and interval grey number complementary comparison matrix is studied. The consistency definitions of four kinds of uncertain grey preference information are defined. Then, the upper and low errors are introduced to solve the inconsistent decision making case. Following that, the weight model for each uncertain preference is proposed respectively. The aggregation approach based on the object of minimal group deviation errors is suggested. In the last, an example is given to show the application of this approach.