In order to give a fast attribute reduction algorithm of the consistent decision table,the condition attributes are divided into three sorts: core attribute,relatively necessary attribute and absolutely superfluous attribute.

Rule acquisition of inconsistent decision table;

The relationship of the positive domain reduction with other reductions of inconsistent decision tables;

Study on harmonious decision and apply;

This paper presents a model of Fuzzy harmonious decision for the problems of multi-factors decision, illustrates the principle of the model and the process of computation, and introduces the design of intellectualized computer aided supporting system-multi-use Decision supporting system.

Method of build simplest decision tree based on coordination degree;