Abstract: The Analysis Network Process(ANP) is the effective method to resolve the complex decision problem. But the traditional ANP method has obvious limitation, which is the express means about the relative importance of elements and the problem about group decision. To solve this problem, this paper used "interval scales" to replace "point estimating", adopted GOWA operator to aggregate the group preference and established the decision method that is named the group extension ANP based on interval scales. Finally, the application example demonstrates the method.

Key words: Group extension analysis network process, Decision method, Interval scales