FinalData and Method2Data

A decisionmaking method considering loss and regret psychology of decision makers under interval-valued hesitant fuzzy information environment is proposed for emergency decision making problem, in which the support relationship exists among attributes. Firstly, interval-valued hesitant fuzzy credibility and support degree are defined based on interval-valued hesitant fuzzy similarity. Modified interval-valued hesitant fuzzy weighted power averaging and method for obtaining attributes’ weight are presented based on credibility. Secondly, method for determining the utility values of alternatives is proposed. Loss values and regret values of alternatives are obtained based on prospect theory and regret theory respectively considering the characteristics of the psychological behavior of decision makers’ loss aversion and regret aversion. And then the decision makers’ overall perceived utility values of alternatives are calculated and ranking result could be obtained. Finally, a numeric example analysis illustrated that the proposed method is feasible and effective.