In this study, it was tried to solve two subjects. One is about how the combination of the optimal attribute is extracted out of a huge decision rule. Another is about how many are appropriate to the number of attributes with which man can recognize a form, color, etc. The decision rule analysis method using the column score calculated from CI value of a decision rule was applied. Comparison with the analysis result by the conventional qualification theory was performed. And the combination of an attribute and an attribute which has had on evaluation is examined. Moreover, comparison at the time of changing the number of attributes from 2 to 9 is performed using a decision rule analysis method.
