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Table 1

Saaty's 1–9 scale of pairwise comparisons (Edamo et al. 2022a, 2022b, 2022c)

Intensity of importanceDefinitionExplanation
Equal importance Two activities contribute equally to the objective 
Weak or slight  
Moderate importance Experience and judgement slightly favor one activity over the other 
Moderate plus  
Strong importance Experience and judgment strongly favor one activity over another 
Strong plus  
Very strong An activity is favored very strongly over another 
Very, very strong  
Extreme importance The evidence favoring one activity over another is of the highest possible order of affirmation 
Intensity of importanceDefinitionExplanation
Equal importance Two activities contribute equally to the objective 
Weak or slight  
Moderate importance Experience and judgement slightly favor one activity over the other 
Moderate plus  
Strong importance Experience and judgment strongly favor one activity over another 
Strong plus  
Very strong An activity is favored very strongly over another 
Very, very strong  
Extreme importance The evidence favoring one activity over another is of the highest possible order of affirmation 
Table 2

Average random consistency (RI) (Edamo et al. 2022a, 2022b, 2022c)

Size of matrixRandom consistency
0.58 
0.9 
1.12 
1.24 
1.32 
1.41 
1.45 
10 1.49 
Size of matrixRandom consistency
0.58 
0.9 
1.12 
1.24 
1.32 
1.41 
1.45 
10 1.49 

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