Step3: acquiring and aggregating the assessments of decision
makers. To measure the relationship between evaluation factors
C =
{Ci|i = 1, 2, ..., n}, it is usually necessary to ask a group of experts
to make assessments in terms of influences and directions between
factors. Then, using the CFCS method, those fuzzy assessments are
defuzzified and aggregated as a crisp value which is the zij. Hence,
the initial direct-relation matrix Z = [zij]n
×
n can be obtained by Eqs.
(7)–(15).