the overlaps between the MFs of each quality index were
adjusted with expert’s opinion. The fuzzy rules obtained
through combining the MFs of the quality indices are presented
in Table 2. These rules are used for creating relationships
between the input and output variables. The
values in the parentheses at the end of each row indicate
the weight of each rule which is employed by implication
functions to create the result of antecedents in the fuzzy
inference system. Each rule has a weight (a value between
0 and 1) affecting the output of the antecedent section considering
the type of fuzzy operator. Here, 25 rules were