Worked Walkthrough: Build a Control Plan for ETA AI

The ETA model improved after changes, but the team has no written way to detect when the gain erodes or what to do when a high-risk segment drifts. Control plan: metric -> segment -> threshold -> owner -> cadence -> response rule The common trap is to celebrate the overall average and stop. Overall accuracy can stay acceptable while a high-penalty lane, cold-chain flow, or low-telematics carrier becomes unsafe for customer-facing promises. Choose the metric Track median absolute ETA error and the share of shipments exceeding the customer-promise threshold. Use one central accuracy metric and one business-impact metric so the…

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