Formalization of Expert Knowledge About the Usability of Web Pages Based on User Criteria Aggregation

The Choquet integral based on fuzzy measure is a generalization of the weighted average operator. Due to flexibility in the aggregation of information and ability to take into account possible uncertainties in data the integral has been gaining popularity in the application of multicriteria decision making. In this paper an application of fuzzy integral is considered in the method of expert knowledge formalization about the usability of web pages. Also the problem of identification of fuzzy measures for aggregating user criteria is presented. Examples of assessments for 9 main usability criteria of web pages and results of web pages evaluation of 25 sites of leading universities in the world according QS ranking are provided.