关键词: Rough集, 多属性决策, 综合客观权重, 决策案例

Abstract: Rough set is applied to the problems of multi-attribute decision making.Through introducing the integrated impersonal weight，it can give a new algorithm of decision making based on the existed decision case.The fundamental ideas are as follows.A decision table is set up according to the existed decision case； then the weights of condition attributes are calculated，using the concepts about importance of attributes，local weight and global weight； and then the integrated impersonal and subjective weight are regulated through experiential factor，and get the final weight of all attributes； and then it calculates the next decision object’s decision value by applying the above weights.The decision value is the accordance of the decision making.At last，an example is given to show the practical value of the method.

Key words: rough set, multi-attribute decision making, integrated impersonal weights, decision case