A key problem of multiple criteria group decision making (MCGDM) is to find the optimal solution on the condition of the maximum consistency and how to measure the consensus degree of the solution.

群体决策的主要目标是寻求一致或妥协，寻求极大化一致性的最优协调解以及如何测度解的一致性一直是多准则群体决策理论与方法研究的核心问题之一。

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