Abstract: In this study, we propose a new method for determine maximally productive units based on input-output orientation data envelopment analysis. In this method, we find that reduce inputs and improve outputs units without regard to any factor weights is possible. The new method is a linear mathematical programming technique that determines the intensities of units. No assumptions are required on the internal transformation processes of the units. Decision making depends critically on the way excellent units are frequently described. Present findings have implications for the monitoring and financing of units. Some units with the maximal productivity should be considered as a guide for the other units to reduce inputs and improve outputs units. Numerical illustrations are provided for 15 hospitals dataset of Sherman and 12 hospitals in Tehran, Iran.