Bipolar approach applied to group decision making problems

Abstract

This paper considers group decision making problems (GDM) in bipolar context where actors provide their preferences over alternatives through positive and negative attributes. A soft consensus model based on distance between evaluations is proposed to narrow the differences between decision makers and to ensure convergence of individual preferences towards group preferences. A feedback mechanism defined by the identification and consensus phases is introduced to reach a consensus. For a group with interactive relationships, the potential reciprocal influence of decision makers is considered using concordance and discordance measures.