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The Official Journal of the Pan-Pacific Association of Input-Output Studies (PAPAIOS)

Table 1 Saaty’s fundamental comparison scale (1–9).

From: Sustainable livelihood alternatives among Nile perch (Lates niloticus) fishers in Lake Victoria Tanzania: analytical hierarchy process (AHP) approach

1Equal importance/preference/likelihoodTwo elements contribute equally to the goal/parent element
3Weak dominanceExperience or judgment slightly favors one element over another
5Strong dominanceExperience or judgment strongly favors one element over another
7Demonstrated (very strong) dominanceExperience or judgment strongly very strongly favors one element over another (an element’s dominance is demonstrated in practice)
9Absolute dominanceThe evidence favoring an element over another is affirmed to the highest possible order
2, 4, 6, 8Intermediate valuesFurther subdivision or compromise is needed
Reciprocals of the aboveIf activity i has one of the above nonzero numbers assigned to it when compared with activity j, then j has reciprocal value when compared with ii.e., If x is 5 times y, then y = x/5
RationalsRations arising from the scaleIf consistency were to be forced by obtaining n numerical values to span the matrix