Service Analytics

7.(Sequential) Pattern Analysis

How can we measure the usefulness of association rules?

Lift: Der Lift gibt an, wie hoch der Konfidenzwert für die Regel den Erwartungswert übertrifft, er zeigt also die generelle Bedeutung einer Regel.
  • Lift quantifies usefulness of an association rule 
  • clearly different from 1 are preferred to those with Lift ungefähr 1
  • Lift being close to 1 means that antecedent and consequent are statistically independent (antecedent does not alter “probability” of consequent)
    Such relationships not useful – we prefer association with lift different than 1
     
    Für Regel diapers --> beer
     

Diskussion