Use Five Whys to find the source of recurring parse defects.
Cleaning fork Every Monday, 700 date values arrive as 13/06/26 and fail the warehouse load. The analyst fixes the format weekly, but the defect keeps returning. The first move determines whether you learn or simply overwrite. Five Whys root cause analysis Five Whys is useful when a cleaning defect recurs and the visible error is only a symptom. The method asks why the defect happened, then asks why that condition existed, until the team reaches a process cause it can change. In data cleaning, the point is not exactly five questions; it is moving from bad value to bad handoff,…
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