Circular Intuitionistic Fuzzy Analysis of Variance on the Factor Season of Apple Sales

The circular intuitionistic fuzzy sets developed by Atanassov are a more versatile tool for defining economic fuzziness than the intuitionistic fuzzy ones. ANOVA is a technique for determining how a certain factor affects the event or process under research. This study extends the intuitionistic fuzzy analysis of variance (IFANOVA) to a circular IFANOVA (C-IFANOVA), where all of its parameters are circular intuitionistic fuzzy numbers. Pessimistic, optimistic, and averaging possibilities are presented to the decision-maker for a final decision. To check the created approach of C-IFANOVA and demonstrate its efficacy, a comparison analysis is conducted using a traditional variation analysis on the sales of the Apple firm for 2019-2022, broken down by the factor “season”.