Use Five Whys to convert a data contract incident into a specific prevention rule.
ARR was overstated by $420K because duplicate subscription movement rows entered a metric-producing table. Five Whys for data contracts: symptom -> failed assumption -> missing promise -> contract rule The common trap is stopping after the query patch. That fixes the current email but leaves the contract unchanged, so the organization learns that incidents are solved by heroic cleanup rather than better promises. Why 1 Why was ARR overstated? Duplicate subscription movement rows were counted twice. Start with the observed business impact, not a vague data is wrong statement. Why 2 Why were duplicates counted? The model did not enforce…
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