A group decision support system by externalizing, sharing and reflecting individual viewpoints

This paper proposes a group decision support method which can analyze participants' individual different viewpoints on their cooperative problem solving. The problem solving is usually complicated because each participant has his individual viewpoints based on his own sense of values. In our method, first, a thinking support method is used to analyze primary factors of a decision problem and to construct a hierarchical evaluation structure of the problem. Secondly, AHP(Analytic Hierarchy Process) is used to evaluate each participant's subjective judgements quantitatively based on the derived structure. In addition, we design a tradeoff analysis support function which applies a sensitivity analysis method to make a consensus formation effectively. Unlike conventional methods using AHP, our method is more analytical and focuses importance on supporting consensus making process. In this paper, we describe the outline of our method and then show an implementation example which works on network environment. The experimental result and system evaluation are also given.リサーチレポート（北陸先端科学技術大学院大学情報科学研究科