Trace oil stains with Five Whys
Use Five Whys to trace a recurring oil stain to a process-level corrective action.
Oil stains are recurring on pale woven fabric after stenter processing, especially near one lane. Five Whys: trace event -> condition -> control failure -> process fix The common shortcut is to spot clean the fabric and tell maintenance to be careful. That treats the visible defect but leaves the lubrication condition and detection gap unchanged. Why 1 Why did the fabric stain? Fresh oil contacted the fabric near the stenter chain guide. Why 2 Why was oil at the chain guide? The guide had been lubricated at shift start and excess oil was not wiped. Why 3 Why was…
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