Monday, 9am. Conversion drops 3.2%. The PM pings Slack: "What happened?" A data engineer queries the warehouse. A data analyst slices dashboards — segment by segment, device by device. Four hours later: maybe they found it. Maybe the drop was systemic and they just burned a morning chasing ghosts. At $200/hour for a data engineer + analyst pair, that's ~$900 per investigation . This happens 2-3 times a week at any SaaS company with meaningful traffic. That's $3,200/week — over $150K/y...