Shafiee, Morteza; Lofti, Farhad Hosseinzadeh; Saleh, Hilda - In: Journal of Industrial Engineering International 12 (2016), pp. 81-91
efficiency at the first time. In this model, multi-level programming and cost efficiency were used. He used a nonlinear … programming to solve the model. In this paper, we have focused on multi-level structure and proposed a bilevel DEA model. We then … used a liner programming to solve ourmodel. In other hand, we significantly improved the way to achieve the optimum …