Reinforcement, also known as the Rule Power Factor, is calculated by multiplying a rule's support by its confidence (both expressed as proportions).
Rule A: 0.02 × 0.80 = 0.016
Rule B: 0.04 × 0.50 = 0.020
Rule C: 0.01 × 0.90 = 0.009
Rule D: 0.03 × 0.60 = 0.018
Rule B yields the largest reinforcement value (0.020), so it is the most powerful rule according to this metric. Rules D, A, and C follow in descending order of reinforcement.
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