The fundamental scale.
|Intensity of importance||Definition||Explanation|
|1||Equal importance||Two activities contribute equally to the objective|
|3||Moderate importance of one over another||Experience and judgement slightly favour one activity over another|
|5||Essential or strong importance||Experience and judgement strongly favour
one activity over another
|7||Very strong importance||An activity is favoured, and its dominance demonstrated in practice|
|9||Extreme importance||The evidence favouring one activity over is of the highest possible order of affirmation|
|2,4,6,8||Intermediate values between the two adjacent judgements||When compromise is needed|
|Reciprocals||If activity i has one of the above numbers assigned to it when compared with activity j, then j has the reciprocal value when compared with i|
Source: Adapted from Saaty .
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