Multi-store ecommerce · USD 5-25M annual GMV · two platforms
CM2 (level-2 contribution margin), POAS, inventory and churn all in separate Google Sheets. Numbers always 2-3 weeks out of date. Monthly P&L review surfaced problems that had been growing for 4-6 weeks.
By day 60: dashboard in active weekly use. The first two anomaly alerts: a returns spike on a SKU (caught 19 days before it would have hit the monthly P&L) and a conversion drop at the biggest store (caught in hours). Monthly P&L stopped bringing surprises.