Use Five Whys on recurring pool chemical drift
Build an evidence-backed Five Whys chain and countermeasure for a recurring water-quality drift.
Free chlorine repeatedly drifts to the low edge before Monday swim school, even though staff correct it when they see it. Ask why until the team reaches a controllable system condition The common trap is stopping at staff did not dose enough, which may describe the symptom but not the system that created it. Why 1 Why was chlorine low before swim school? Weekend bather load increased demand beyond the weekday baseline. The first why uses schedule and bather-load evidence, not a guess about effort. Why 2 Why did the system not adjust? The feeder cap remained set for the…
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