M. Kazemimanesh - Islamic Azad University Saveh Branch. DepartmentofAppliedMathematic
M. Khanmohamadi - Islamic Azad University Eslamshahr Branch.-Department of Applied Mathematics

For calculating efficiency of Decision Making Units (DMUs), Data Envelopment Analysis (DEA) usually minimize inputs and maximize outputs. Many papers, consider both inputs and outputs as desirable or undesirable factors only in one of inputs or outputs. In this paper, we propose a model that considers both of desirable and undesirable factors for inputs and outputs. Then we compute efficiency score.

DEA, Undesirable inputs, Undesirable outputs. Efficiency; DMU