Consistency checks for deviation of subjective evaluation in GDM based on χ~2 statistic

It was discussed that how to judge whether an expert's results meet the requirements for group decision making,that is,whether the expert's deviation of subjective evaluation satisfies the consistency requirement.Based on chi-square statistic,deviation checks were performed on the consistancy of the following aspects: overall deviation,experts' deviation,deviation of alternatives,deviation of attributes and the deviation of an aggregation of experts' alternatives and attributes.Finally,a case was presented.