A variance-based consensus degree in group decision making problems
- Maria Jose del Moral Avila, Department of Statistics and O.R., Granada University, Granada, Spain
- Francisco Chiclana, DIGITS, De Montfort University, Leicester, United Kingdom
- Juan Miguel Tapia Garcia, Department of Quantitative Methods for Economics and Business, Granada University, Granada, Spain
- Enrique Herrera-Viedma, DECSAI, Granada University, Granada, Spain
AbstractThe variance is a well-known statistical measure and is frequently used for the calculation of variability. This concept can be used to obtain the degree of agreement in groups that have to make decisions. In this study, we propose the use of a variance derivative as an alternative for the calculation of the degree of consensus for Group Decision Making problems with fuzzy preference relations. As revealed by a subsequent comparative study, the values obtained by this new method are comparable to the values obtained by means of frequently used methods that employ distance functions and aggregation operators, while it turns out to be a simpler application method.
Return to previous page