出版社：Japan Society for Fuzzy Theory and Intelligent Informatics
摘要：We improve the efficiency of a DMU considering its interval efficiency value based on DEA by adjusting its outputs. The DEA model to obtain an interval efficiency value which consists of evaluations from both the optimistic and pessimistic viewpoints has been formulated. DMUs which are not rated as efficient in the conventional sense are improved by adjusting outputs so that their lower bounds become as large as possible in the production possibility set and their upper bounds attain the maximum value one. The lower bound of interval efficiency value becomes small when the DMU's inputs and outputs are not balanced. Therefore considering the lower bounds in improvement, the adjusted outputs can keep the balance each other. A new approach to improvement by adjusting only outputs without decreasing the given outputs anymore is proposed in this paper. By extending the proposed approach, it is suggested that the approaches to improvement by adjusting only inputs and both inputs and outputs simultaneously can be obtained. Numerical examples are shown to illustrate our proposed approaches.
