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Table 2 Scale for pairwise comparisons

From: Identification and weighting of kidney allocation criteria: a novel multi-expert fuzzy method

Importance level Corresponding intuitionistic fuzzy sets Reciprocal intuitionistic fuzzy sets
Equal Importance (EI) (1, 1, 1; 1, 1, 1) (1.1.1; 1.1.1 )
Weak Importance (WI) (2, 3, 4; 1, 3, 5) \( \left(\frac{\mathbf{1}}{\mathbf{4}}.\frac{\mathbf{1}}{\mathbf{3}}.\frac{\mathbf{1}}{\mathbf{2}};\frac{\mathbf{1}}{\mathbf{5}}.\frac{\mathbf{1}}{\mathbf{3}}.\mathbf{1}\ \right) \)
Fairly Strong Importance (FSI) (4, 5, 6; 3, 5, 7) \( \left(\frac{\mathbf{1}}{\mathbf{6}}.\frac{\mathbf{1}}{\mathbf{5}}.\frac{\mathbf{1}}{\mathbf{4}};\frac{\mathbf{1}}{\mathbf{7}}.\frac{\mathbf{1}}{\mathbf{5}}.\frac{\mathbf{1}}{\mathbf{3}}\ \right) \)
Very Strong Importance (VSI) (6, 7, 8; 5, 7, 9) \( \left(\frac{\mathbf{1}}{\mathbf{8}}.\frac{\mathbf{1}}{\mathbf{7}}.\frac{\mathbf{1}}{\mathbf{6}};\frac{\mathbf{1}}{\mathbf{9}}.\frac{\mathbf{1}}{\mathbf{7}}.\frac{\mathbf{1}}{\mathbf{5}}\ \right) \)
Absolute Importance (AI) (8, 9, 9; 7, 9, 9) \( \left(\frac{\mathbf{1}}{\mathbf{9}}.\frac{\mathbf{1}}{\mathbf{9}}.\frac{\mathbf{1}}{\mathbf{8}};\frac{\mathbf{1}}{\mathbf{9}}.\frac{\mathbf{1}}{\mathbf{9}}.\frac{\mathbf{1}}{\mathbf{7}}\ \right) \)