Three-Way Group Decision Based on Large-Scale Social Network

In Chap. 5 , considering the different individual relationship of decision makers in group decision making, the three-way group decision based on social networks has been introduced [15]. With large-scale group participation, competitive behaviors resulted from competition relationship of the decision makers represent one of the important influences. In this case, the effects of competitive behaviors also have an impact on consensus reaching process of group decision making. Thus, considering the individual competition behaviors in large-scale group social networks, this chapter discusses large-scale group consensus decision with increased complexity of group decision making in the framework of three-way decision based on the results of Ref. [8]. This chapter further explores the corresponding competitive behaviors in information interaction of social networks. According to the competitive behaviors, the construction of a new optimization consensus model in consensus reaching process is presented for the evaluation adjustment of large-scale group three-way decision and it can determine the decision result with Bayesian decision procedure. Finally, this chapter applies the proposed model of Ref. [8] to analyze an example of product promotion and verify its effectiveness.