Sort Noise From Signals Before Reacting
Classify OEE metric movements as common-cause noise, special-cause signal, or measurement concern.
Place each OEE metric event in the response bucket it deserves. Common-Cause System Issue Special-Cause Signal Measurement Concern Daily OEE moves between 68% and 73% for three weeks with no rule break One day falls far outside the historical control limit after a new material lot Eight consecutive intervals sit above the center line after a setup change OEE jumps 11 points the day a new downtime screen launches Stable OEE average is 64% against a 75% business need Run time increased after a sensor replacement but total count did not change One day at 76% follows several normal days…
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