Considering the consistency and similarity of judgment matrix,the definition of consensus degree in AHP group decision-making,which is used as the basis to determine whether to stop the interactive process,is proposed.
In order to make the decision-making more objective and accurate,basing on the distinction between experts static weights and experts dynamic weights,the paper researches the method to decide experts dynamic weights in interactive decision-making and brings out a definition of consensus degree.
This article starts from constructing consensus degree model and group s difference coefficient(GDC),then analyzes the effect of GDC on the mediation mechanism for consensus process,and finally proposes that identifying group divergence in evaluat- ing a given alternative is the key element of this research.
Base on it, we present two kinds of concepts of non-commonity, and give the evaluation method by optimization theories and normalization, which overcomes the adverse effect of different non-commonity.
The decision maker\'s weight is determined by the comparability degree of their own judgment matrix from other matrices,and then a consensus matrix was obtained from aggregating these decision maker\'s matrices by the method of weighted geometric mean.
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