A new methodological development for solving linear bilevel integer programming problems in hybrid fuzzy environment

This paper deals with fuzzy goal programming approach to solve fuzzy linear bilevel integer programming problems with fuzzy probabilistic constraints following Pareto distribution and Frechet distribution. In the proposed approach a new chance constrained programming methodology is developed from the view point of managing those probabilistic constraints in a hybrid fuzzy environment. A method of defuzzification of fuzzy numbers using a−cut has been adopted to reduce the problem into a linear bilevel integer programming problem. The individual optimal value of the objective of each DMis found in isolation to construct the fuzzy membership goals. Finally, fuzzy goal programming approach is used to achieve maximum degree of each of the membership goals by minimizing under deviational variables in the decision making environment. To demonstrate the efficiency of the proposed approach, a numerical example is provided.

Keywords:

Bilevel programming, fuzzy goal programming ranking function, stochastic programming,

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