Table 2: 9-point intensity of relative weight (importance or well-being) scale (adapted from [1115]).

Intensity of importance/well-beingDefinitionSignificance

1Equal importance/equally goodTwo activities contribute equally to objective

3Moderate importance of one factor over another/weaklyExperience and judgment slightly favor one activity over another

5Strong or essential importance/stronglyExperience and judgment strongly favor one activity over another

7Very strong importance/very stronglyAn activity is strongly favored, and its dominance is demonstrated in practice

9Extreme importance/absolutely betterThe evidence favoring one activity over another is of the highest possible order of affirmation

Intermediate value between the two adjacent judgmentsWhen a compromise is needed

Reciprocals of the above nonzero numbersReciprocals for inverse comparison