Double-EWMA Control Demo

Advanced statistical process control with exponentially weighted moving averages for real-time parameter adjustment and drift detection

Control Parameters

Process In Control
0.30
0.20
3.0σ
0.0

EWMA Control Chart

+3.0σ
Upper Control Limit
350.0
Target Value
-3.0σ
Lower Control Limit
350.0
Current EWMA

Double-EWMA Equations

\[ E_1(t) = \lambda_1 X_t + (1-\lambda_1) E_1(t-1) \]
\[ E_2(t) = \lambda_2 E_1(t) + (1-\lambda_2) E_2(t-1) \]
\[ \hat{X}(t+1) = 2E_1(t) - E_2(t) \]