首页|A genetic algorithm based on dual hesitant fuzzy preference relations for consensus group decision making[Formula presented]
A genetic algorithm based on dual hesitant fuzzy preference relations for consensus group decision making[Formula presented]
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NSTL
Elsevier
Consensus is an important issue in group decision making as it aims to avoid future contestation by the decision makers. The elicitation of criteria and decision makers’ weights is an essential part of decision-making problems. This study proposes a new consensus model for group decision making based on dual hesitant fuzzy and evolutionary algorithm for the definition of unknown criteria and decision makers’ weights. The Dual Hesitant Fuzzy Preference Relations combines the advantages of intuitionistic and hesitant fuzzy representations, and it is used to deal with the imprecision in decision makers’ judgments. In order to find decision makers weights to reach a better level of consensus without the need to modify initial assessments, the proposed Genetic Algorithm (GA) is applied. An illustrative application case is presented in a large steel company considering sustainable criteria. An instance generator was proposed to create different scenarios of decision making varying the number of criteria, decision makers, and level of hesitation. Several instances were used in the computational tests for the evaluation of the GA performance. The effectiveness of the proposed GA was verified by comparing its results with the results of the implemented Particle Swarm Optimization (PSO) algorithm. The GA yielded solutions with improved consensus levels in a reasonable runtime, especially for a small or medium number of decision makers.
ConsensusDual hesitant fuzzyGenetic algorithmGroup decision making
Calache L.D.D.R.、Carpinetti L.C.R.、Camargo V.C.B.、Osiro L.
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Production Engineering Department S?o Carlos School of Engineering University of S?o Paulo
Production Engineering Department Federal University of S?o Carlos
Production Engineering Department Federal University of Triangulo Mineiro
NSTL
Elsevier
