Over the years a variety of related models have been developed primarily to moderate the pessimistic approach dictated by the worst-case orientation of the model.Kouvelis P, and Yu G. (1997). Robust Discrete Optimization and Its Applications, Kluwer, Boston.Ben-Tal, A, El Gaoui, L, Nemirovski, A. (2009). Robust Optimization. Princeton University Press, Princeton.Bertsimas D, and Sim, M. (2004). The price of robustness. Operations Research, 52(1), 35-53. For example,
