A model of consensus in group decision making under linguistic assessments

This paper presents a consensus model in group decision making under linguistic assessments. It is based on the use of linguistic preferences to provide individuals’ opinions, and on the use of fuzzy majority of consensus, represented by means of a linguistic quantifier. Several linguistic consensus degrees and linguistic distances are defined, acting on three levels. The consensus degrees indicate how far a group of individuals is from the maximum consensus, and linguistic distances indicate how far each individual is from current consensus labels over the preferences. This consensus model allows to incorporate more human consistency in decision support systems.