An Innovative Grey Approach for Group Multi-Criteria Decision Analysis Based on the Median of Ratings by Using Python

Some decision-making problems, i.e., multi-criteria decision analysis (MCDA) require taking into account the attitudes of a large number decision-makers and/or respondents. Therefore, an approach to transformation crisp ratings, collected from respondents, in grey interval numbers form based on median scores, is considered this article. In way, simplicity collecting respondents’ using values, by applying some Likert scale, combined with advantages that can be achieved numbers. extension MCDA methods obtained. The application proposed was example evaluating websites tourism organizations several methods. Additionally, case done Python, presented. method, as well its possible limitations, are summarized.