By means of the two virtual DMUs, the model to determine common weights is made.Based on the common weights, the efficiency measure of each DMU is calculated and the rankings of all DMUs are achieved.

• 该方法借助两个虚拟决策单元，建立模型，求出一组公共权重，并以此为基准计算每个决策单元的效率指数，实现决策单元的排序。