A Flexible Fuzzy Comprehensive Evaluation Method

The comprehensive evaluations of complex systems are worthy of study deeply, and the subjectivity and fuzziness of evaluation objects further increase complexity of the evaluation systems. To attain the final comprehensive evaluation result in increasing evaluation reliability, a flexible fuzzy comprehensive evaluation method is proposed, which is a top-down method for the multi-layer evaluation index system and uses the tunable fuzzy compound operators to attain the final evaluation result. At first, a rough evaluation plan is generated to reach the final goal. Then, the plan is decomposed to many sub-goals which are submitted to the next lower layer of the index hierarchy and the more refined evaluation plans to reach these sub-goals are determined. As the evaluation process moves from high layer to low layer, the information granularity to the comprehensive evaluation becomes finer. This process of successive refinement continues until the final evaluation result is obtained. If only possible, the evaluation work will be finished depending on the part of index hierarchy, and it is not necessary to do the calculations for all the indexes. Finally, the practical applications indicate the effectiveness of the proposed method.