Describe a five-step funnel for investigating spreadsheet error signals.
A margin spike needs investigation. Use the funnel to move from visible symptom to controlled release. Spreadsheet Error Audit Funnel Symptom Name the number that looks wrong. Start Trace Show precedents and dependents. Dependency path Inspect Compare neighboring formula patterns. Local defect Reconcile Tie back to source exports or control totals. Evidence Lock Save the release version and change note. Version hygiene Visible symptom
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