Group decision making and consensual processes

Abstract

This chapter introduces the basic concepts and ideas behind Group Decision Making (GDM) problems under uncertainty, highlighting its core underlying processes—aggregation of information and alternative(s) selection—and preference modeling approaches. Consensus building principles and its numerous related approaches to support accepted group decisions are then introduced in detail. Finally, given the frequent co-occurrence of decision scenarios involving both groups of participants and multiple evaluation criteria, the chapter concludes with an overview of classic Multi-Criteria Decision Making (MCDM) methods.