A group consensus building model by the DEAHP

We propose the problems of multiple Decision Maker(DM)s´ consensus building in this paper. The problems are classified two models from viewpoints of decision makers´ pattern. First model has Super Decision Maker(SDM) and DMs. Second Model has only DMs. The former model with SDM and DMs is corresponded to the traditional Analytic Hierarchy Process(AHP) model which can be solved the AHP method. The former model with SDM and DMs is also called the Group-AHP model. The latter model called group-DEAHP with only DMs is solved by the Data Envelopment Analysis(DEA). This paper focus on latter model, the efficient solution procedure is proposed based on the grey system theory.