Ewma Chart Options Properties
Properties
| Lambda | Gets the EWMA smoothing constant λ in the interval (0, 1]. |
| Sigma | Gets the optional explicit process sigma (σ) to use for computing EWMA control limits. |
| Target | Gets the optional process target value (μ₀) to use as the EWMA center line and starting value. |
| Width | Gets the control-limit width multiplier L (often denoted k or L in the literature). |