Consensus reaching model with individual satisfactions in group decision making

In the consensus reaching process (CRP), different decision makers will concern with different alternatives. As a result, decision makers will naturally use individual consensus methods to measure individual consensus degrees. Meanwhile, it is difficult to set the consensus threshold to judge whether a consensus degree can be acceptable. In order to develop the individual consensus methods and avoid setting the consensus threshold, this study proposes a novel consensus reaching model with individual satisfactions in group decision making (GDM). In this consensus reaching model, the novel individual consensus measure methods are defined by taking into account the individual concerns on the alternatives. Then, based on numerical individual consensus degrees, a linguistic index is developed to evaluate the satisfaction degree. Finally, the feedback adjustment process is used to help decision makers to modify their opinions. A numerical example is provided to show the application of the proposed consensus reaching model.