Tilahun, Surafel Luleseged - In: Operations research perspectives 6 (2019), pp. 1-8
described using multilevel optimization problem. Different organizational structure adapt a hierarchical decision making system … region will be determined which is a subset of the relaxed feasible region. To deal with the multiobjective optimization … problem, preference free method called ideal point method will be used. Bi-level numerical examples are also given to …