Use Five Whys to move from callback blame to a process-level countermeasure.
Repeat defect Three GFCI callbacks in one month. The business needs a countermeasure, not a louder reminder. Framework Five Whys + PDCA Ask why until the cause becomes a fixable process condition, then test the countermeasure. Shortcut tell techs to be careful Fewer repeat callbacks Do not stop at human error when the same error repeats. 01 Symptom 02 Cause 03 Countermeasure 04 Fresh try
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