Table 2.

Transformation table of linguistic variables (You et al. 2017)

Linguistic terms	Membership function
Equally important (EI)	(1, 1, 1)
Weakly important (WI)	(0.6667, 1, 1.5)
Fairly important (FI)	(1.5, 2, 2.5)
Very important (VI)	(2.5, 3, 3.5)
Absolutely important (AI)	(3.5, 4, 4.5)

Note that ${\tilde{A}}_{\mathrm{B}}=\left({\tilde{a}}_{\mathrm{B}1},{\tilde{a}}_{\mathrm{B}2},\dots ,{\tilde{a}}_{\mathrm{Bn}}\right)$ denotes the vector of comparison between best-to-others and ${\tilde{A}}_{\mathrm{W}}=\left({\tilde{a}}_{1\mathrm{W}},{\tilde{a}}_{2\mathrm{W}},\dots ,{\tilde{a}}_{\mathrm{nW}}\right)$ shows the vector of comparison between others-to-worst.