“…This method does not directly map the data interval uncertainties into Membership Function (MF) uncertainties, as do the IA and EIA and it leads to normal IT2 FSs. Other methods are also proposed in (Pagola et al, 2013;Bilgin et al, 2012;Moharrer et al, 2013). These approaches introduce another level of uncertainties called methodological uncertainty (Hao and Mendel, 2015).…”