Z-Score Thresholds vs. Isolation Forest: What Each Catches in Expense Fraud
A synthetic expense-fraud test: z-score thresholds catch 98% of obvious spikes but only 4% of contextual fraud; Isolation Forest catches 46% of the same cases.
A synthetic expense-fraud test: z-score thresholds catch 98% of obvious spikes but only 4% of contextual fraud; Isolation Forest catches 46% of the same cases.