A survey of consensus in group decision making under the CWW environment

Developing an evaluation matrix and selecting the optimal alternative are two crucial stages in any decision-making process. The development of an evaluation matrix involves two key steps: ensuring individual consistency and reaching group consensus. The latter is particularly effective in resolving decision-making problems, as it seeks to identify the best alternative based on the satisfaction levels of various decision-makers. This survey comprises three parts that outline current research and provide insights into future directions for group consensus measurements. Firstly, it revisits the two-part group consensus method, which involves the distance and similarity degree. Then, it highlights the challenges associated with the current developments in group consensus under the computing with words (CWW) environment. Finally, it offers suggestions for future research topics in the group consensus process. (c) 2023 Elsevier B.V. All rights reserved.