Walk a validation failure to root cause
Use Five Whys to move from a parking symptom to a process root cause and a practical countermeasure.
Exit lane Twelve visitors are queued behind one expired validation QR code. The first explanation is that guests scan the wrong code. The walk is to keep the team moving from blame to a changeable process cause. Five Whys Ask why from evidence, not irritation Each why should narrow the causal chain. If a why answer names a person but not a condition, keep going. Stop at driver error Feels fast, repeats next event A countermeasure that prevents recurrence Root cause work is useful only when it changes the system condition. 01 Symptom 02 Cause chain 03 Fresh case Question…
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