A New Grey Approach for Using SWARA and PIPRECIA Methods in a Group Decision-Making Environment

The environment in which the decision-making process takes place is often characterized by uncertainty and vagueness and, because of that, sometimes it very hard to express criteria weights with crisp numbers. Therefore, application Grey System Theory, i.e., grey numbers, this case, convenient when comes determination partially known information. Besides, have a significant role multiple process. Many ordinary methods are adapted for using case article as well. A new extension certain proposed. aims propose Step-wise Weight Assessment Ratio Analysis (SWARA) PIvot Pairwise Relative Criteria Importance (PIPRECIA) group decision-making. In proposed approach, attitudes decision-makers transformed into attitudes, allows taking advantage benefit that numbers provide over main approach relation use ability conduct different analyses, considering scenarios, such pessimistic, optimistic, so on. By varying value whitening coefficient, can be obtained, should emphasized gives same coefficient has 0.5. addition, number was formed based on median collected responses better maintains deviation from normal distribution responses. considered through two numerical illustrations, appropriate conclusions were drawn.