Resource re-allocation at network units by using of bi-level data envelopment analysis

The lack of renewable primary resources is one of the most serious challenges in recent decades. So under this circumstance, managers are looking for appropriate solutions for the optimal use of these resources to improve the efficiency of the under management units.  One of the most widely used techniques in finding the optimal resource is data envelopment analysis (DEA). So in this paper, in order to resource re-allocation in parallel systems, a new DEA model is introduced. Then by using of bi-level programing, a new method is applied to solve proposed model. Finally, for the validity of the proposed model, the new model is applied to a real case study and analyzed the obtained results.