Table 3.

Differences between the proposed methodology and some existing methods.

Method	Type of eigenvalue and eigenvector	Shape of membership functions	Efficiency	Accuracy
FGM	Fuzzy	Triangular	Very high	Low
FEA	Crisp	–	Very high	Very low
FICSM	Fuzzy	Triangular	Very high	Low
ACO	Fuzzy	Nonlinear	Very low	Very high
xACO	Fuzzy	Logarithmic	Low $\sim$ moderate	High
The proposed methodology	Fuzzy	Piecewise Linear	Very high	Moderate to High