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Table 2

Saaty's 1–9 scale of relative importance (Saaty 1980)

Scale123456789
Importance Equal importance Weak Moderate iImportance Moderate plus Strong importance Strong plus Very strong importance Very, very strong Extreme importance 
Scale123456789
Importance Equal importance Weak Moderate iImportance Moderate plus Strong importance Strong plus Very strong importance Very, very strong Extreme importance 
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