Possibility degree and sensitivity analysis in possibilistic multiobjective linear programming problems

We consider possibilistic multiobjective linear programming problems. Possibly efficient solution set is defined as a fuzzy set whose membership grade represents possibility degree of efficiency for a feasible solution. We restrict possibilistic distributions of coefficients in the problems, so that we can propose a novel calculation method of possible efficiency degree. Applying the result of our calculation method to sensitivity analysis, we can discuss re-adjustment for parameters of the possibilistic distribution.