Shewhart Control Charts: X-bar/R, X-bar/S, EWMA and Nelson Rules for Sub-Zero Defects
Deploying real-time automated statistical process control charts on plant floors to detect special-cause variation before non-conforming parts are produced.
Statistical Process Control (SPC per AIAG 2nd Edition) separates natural common-cause variation from assignable special-cause variation.
ADM Charts automates industrial control charting: • X-bar and R / S Charts: Monitoring subgroup averages and dispersion for continuous dimensional characteristics. • EWMA (Exponentially Weighted Moving Average): Detecting subtle mean drifts in high-volume machining and automated stamping lines. • Automated Nelson / Western Electric Rules: Instantaneously detecting out-of-control conditions (e.g., 9 consecutive points on one side of the center line, 6 consecutive increasing points), alerting plant engineers before tolerances are breached.