A method based on grey incidence analysis and MYCIN certainty factor is proposed for decision-making
problems with the attribute values of corresponding alternatives in the form of interval-valued intuitionistic fuzzy numbers.
The MYCIN certainty factor method is integrated into decision-making theory, and the trust degrees of different indices are
determined by using the grey incidence analysis. By computing the certainty factor of all alternatives in different indices and
fusion of them, the best alternative is obtained. Finally, an example analysis shows the feasibility and effectiveness of the
proposed method.