Multi-criteria sorting method based on AHP and variable precision rough set

This paper presents a multi-criteria decision making method based on variable precision rough set (VPRS) and analytic hierarchy process (AHP). In the method, attribute reduction is firstly implemented on the given pairwise comparison table based on dominance relation rough set theory. AHP is then used to test the consistency of the comparison table due to the transitive property of dominance relation. If the table is reliable, decision rules will be extracted by VPRS method, and finally the sorting result will be obtained. The feasibility and effectiveness of this method is demonstrated by an illustrative example.