为了避免传统的权值确定方法所带来的主观性影响，将粗糙集理论引入可拓权重系数的求解过程中，使权系数问题转化为属性重要度评价问题。
To avoid the excessive subjectivity influenced by the conventional determination methods of weight factor, the rough set was introduced to the solution of the weight factor in the extenics evaluation.
采用VIKOR模型建立预制构件供应商多指标评价模型，并采用客观赋权的变异系数法确定评价指标的权重系数。
Then, builds the selection model of prefabricated element supplier base on VIKOR model, and calculates the weight coefficients based on variation coefficient method.
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