A key figure attached to a product association rule, which describes the measure of strength of an effect. It measures the difference between the confidence of a rule and the expected confidence. It is the ratio between the confidence and the support of the dependent items (expected confidence).
Given a rule containing one leading product "A" and one dependent product 'A' and one dependent product 'B',
Lift = Confidence (A) / Support (B).
Słownik i definicje SAPa na L.