Use Five Whys to move from callback symptom to process-level corrective action.
A repeat no-cooling callback keeps returning to the same customer. Five Whys root-cause chain Stopping at 'the technician missed it' creates blame, not prevention. Why 1 Why did the customer call back? The system cooled briefly, then failed again after the original visit. Start with the observed failure. Avoid opinions about effort or attitude. Why 2 Why did the failure return? The intermittent fault did not appear during the short test run. The second why moves from customer symptom to diagnostic condition. Why 3 Why was the test run short? The tech had another no-cooling call queued and closed after…
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