Identifying the Divergence of a Given Alternative for Consensus Process in Group Decision Making

On the understanding that the weight of decision-makers is unchangeable, the theoretical framework of this research is put forward. This article starts from constructing consensus degree model and group´s difference coefficient (GDC), then analyzes the function of GDC on the mediation mechanism for consensus process, and proposes that identifying the group divergence in evaluating given alternative is the key element of research. In the light of alliance enterprises, this article not only proves that identifying evaluation divergence of a given alternative in mediating consensus process is effective, but also reaches some valuable conclusion. The conclusions are obtained by the models calculated from actual alliance enterprises, which includes: firstly, the 6 members delegating alliance enterprises differ in evaluation of the initial alternatives; secondly, GDC makes divergence degree between group´s evaluation of a given alternative and of other alternatives clear; finally, GDC not only provides a basis for adjusting consensus process mediation mechanism alternatives, but also directs participants in full discussion (Simon, 1977).