Data Observability

Based on 800 hours of Card transaction data (Mar 23 – Apr 25, 2026): • 16 anomalous hours detected (fraud rate > 5.81%, the 2σ threshold) • 2 Critical spikes: Apr 19 05:00 (7.26%) and Apr 09 21:00 (7.25%) • Immediate actions: Trigger velocity checks on high-risk merchant categories; flag accounts with >3 fraud transactions in a rolling 24h window • Review freshness pipeline — 173 hours breached the 8-min SLA, which can mask real-time fraud signals • Schema drift detected in 85 hours; validate downstream feature pipelines are ingesting correct column definitions