Table 1.

Linguistic terms and corresponding spherical fuzzy numbers

Priority in pairwise comparisons	$\mu ,\nu ,\pi$	Score index (SI)
Absolutely more importance	(0.9,0.1,0.0)	9
Very high importance	(0.8,0.2,0.1)	7
High importance	(0.7,0.3,0.2)	5
Slightly more importance	(0.6,0.4,0.3)	3
Equally importance	(0.5,0.4,0.4)	1
Slightly low importance	(0.4,0.6,0.3)	1/3
Low importance	(0.3,0.7,0.2)	1/5
Very low importance	(0.2,0.8,0.1)	1/7
Absolutely low importance	(0.1,0.9,0.0)	1/9