M. Homayounfar - Department of Management, Rasht Branch, Islamic Azad University, Rasht, Iran.
AR. Amirteimoori - Department of Mathematics, Rasht Branch, Islamic Azad University, Rasht, Iran
M. Goudarzvand- Chegini - Department of Management, Rasht Branch, Islamic Azad University, Rasht, Iran

DEA as an effective approach to evaluate the relative efficiency of DMUs, recently applied in many production and operation systems. This paper proposed a new k-stage DEA based MOLP model for target setting in the serial network structures, considering undesirable outputs. Since the proposed model takes the size of DMUs into account, the new idea ensures the possibility of the results. The results showed the applicability of the proposed plan.

K-Stage Network, Data envelopment analysis (DEA), Production Planning, Undesirable outputs, Efficiency Evaluation