2.1 Fuzzy Delphi
Delphi technique is a strong process based on the group communication
structure used for cases where incomplete and uncertain knowledge is
available 19. The main aim is to reach a consensus
among experts 20. In the classical Delphi method,
experts’ opinions are expressed in the structure of definite numbers,
while those who are experts are using their mental competencies to
express their opinion, which indicates the uncertainty that governs
these conditions. Uncertainty is compatible with fuzzy sets. Therefore,
it is better to obtain data in the structure of the verbal variables
from the experts and analyze those using fuzzy sets.