Identify control-chart signals that require investigation in textile process data.
Sort each process pattern by the response it deserves. Investigate special cause Monitor common variation Check measurement system One GSM point outside the upper control limit after yarn lot change Eight width readings in a row above the centerline after clip replacement Shade Delta E readings scattered randomly within control limits Seam strength points alternate high-low after two testers switch every sample Fabric shrinkage slowly trends upward across six consecutive lots Moisture regain readings cluster tightly around historical average pH readings jump after a probe cleaning and calibration date is unknown Random one-day variation appears during normal humid weather
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