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📊 Gage Stability Study
Monitor master-part drift over time · I-MR control chart tests
① Parameters
② Enter readings for each period
What is a gauge stability study?
· Purpose: confirm whether gauge readings drift over time. Method: the same master part, same gauge, same appraiser, measured once per fixed interval (daily/weekly) and plotted
· Reading: all points inside control limits with no abnormal pattern (out of limits / 9-in-a-row on one side / 6-in-a-row monotonic) → gauge is stable; drift beyond limits → check environment, master wear, whether recalibration is needed
· Together with Bias/Linearity (Type 1) and Gage R&R, it forms the four AIAG MSA variable-type studies.
· Reading: all points inside control limits with no abnormal pattern (out of limits / 9-in-a-row on one side / 6-in-a-row monotonic) → gauge is stable; drift beyond limits → check environment, master wear, whether recalibration is needed
· Together with Bias/Linearity (Type 1) and Gage R&R, it forms the four AIAG MSA variable-type studies.
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About Gauge Stability Analysis
Gauge stability study: repeat measurement of one master part over time, monitor drift with an I-MR chart and judge measurement-system stability.
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