The priorities aggregation approach in unequal power group decision making

The Analytic Hierarchy Process (AHP) is one of the most popular methods for multiple criteria decision-making that has been also applied for group decision-making. The recent modifications of the AHP to group decision analysis deal with equal importance of the individual members in the team, defined as a "power" of the member. However, not every member of the group is an expert in all fields and providing a single value that represents the power of the member regarding all criteria is inappropriate. Each member should have different power values for the different criteria. A new approach is proposed to aggregate the priorities concerning different criteria provided by members having number of different powers. The members submit judgments regarding the criteria, while the priorities are derived by standard prioritization method, used in the AHP. Then these priorities are aggregated using a new weighted geometrical mean approach. The main advantage of this approach is that it can deal with incomplete data. Examples are included to evaluate the improvements,