The main problem of the traditional DEA model is that the distribution of index weight is not reasonable and cannot sort the decisionmaking units effectively. Many scholars constantly try to use various methods to improve the traditional DEA model, but the current research results either require value anticipation or they don’t have the unique solution. The optimal virtual decision-making units are introduced to the DEA model in this paper, and by comparing the optimal virtual decision-making units with the actual decision-making units to dete...
