Table 1.

Meaning of importance scale [38].

Scale	Meaning
0.5	Both are equally important
0.6	The former is slightly more important than the latter
0.7	The former is obviously more important than the latter
0.8	The former is strongly more important than the latter
0.9	The former is extremely more important than the latter
0.1, 0.2, 0.3, 0.4	If xi is compared with xj,rij is obtained, and xj is compared with xi with results in rji=1 − rij
	0.55, 0.65, and 0.75 represent the median value of adjacent grades