Group Decision Making Process for Supplier Selection with TOPSIS Method under Interval-Valued Intuitionistic Fuzzy Numbers

Table 4

Linguistic terms for rating the alternatives.

Linguistic terms	IVIF numbers
Extremely good (EG)/extremely high (EH)	⟨[1.00,1.00],[0.00,0.00]⟩
Very very good (VVG)/very very high (VVH)	⟨[0.80,0.90],[0.05,0.10]⟩
Very good (VG)/very high (VH)	⟨[0.70,0.80],[0.05,0.10]⟩
Good (G)/high (H)	⟨[0.60,0.70],[0.15,0.20]⟩
Medium good (MG)/medium high (MH)	⟨[0.50,0.60],[0.25,0.30]⟩
Fair (F)/medium (M)	⟨[0.40,0.50],[0.35,0.40]⟩
Medium bad (MB)/medium low (ML)	⟨[0.30,0.40],[0.45,0.50]⟩
Bad (B)/low (L)	⟨[0.15,0.25],[0.55,0.60]⟩
Very bad (VB)/very low (VL)	⟨[0.00,0.10],[0.70,0.75]⟩
Very very bad (VVB)/very very low (VVL)	⟨[0.00,0.10],[0.85,0.90]⟩