Abstract:

here exist two problems that need to be solved on the efficient measure of generalized data eve-lopment-analysis (DEA). Firstly, when the generalized DEA model is infeasible, the efficiency of the decision making unit cannot be expressed by detailed figures although it is efficient. Then, when decision making units are generalized DEA efficient, the efficiency of some decision making units may be over estimated. For these problems, first of all, a new generalized DEA model is given. Then, a necessary and sufficient condition for judging the infeasibility of the generalized DEA model is given as well as the condition that the efficiency of decision making unit is overvalued. At the same time, three methods to measure the efficiency of decision making unit are provided, and the relationship between these methods and the original method is discussed. Finally, a comparison study is done by an example.