Struct IterativePhase1Config 

pub struct IterativePhase1Config {
    pub spm: SpmConfig,
    pub max_iterations: usize,
    pub remove_t2_outliers: bool,
    pub remove_spe_outliers: bool,
    pub max_removal_fraction: f64,
}

Configuration for iterative Phase I chart construction.

The iterative approach assumes outliers are a minority of the data. When more than max_removal_fraction of the original data would be removed, the procedure stops early, preserving the remaining data for analysis.

Fields

spm: SpmConfig

Base SPM configuration.

max_iterations: usize

Maximum number of iterations (default 10).

remove_t2_outliers: bool

Remove observations exceeding the T-squared limit (default true).

remove_spe_outliers: bool

Remove observations exceeding the SPE limit (default true).

max_removal_fraction: f64

Maximum cumulative fraction of original data that can be removed (default 0.3). Iteration stops if the next removal batch would push the total removed count above this fraction of the original dataset size.

This acts as a safeguard against breakdown: if more than 30% of the data is flagged, the in-control model is likely misspecified rather than there being isolated outliers (Rousseeuw & Leroy, 1987, section 4.1, pp. 116–119).

If removal rates don’t decrease across iterations (e.g., oscillating around 0.3–0.5), the process likely has sustained non-stationarity rather than isolated outliers. Consider increasing alpha or investigating the data for structural changes.

Trait Implementations

impl Clone for IterativePhase1Config

fn clone(&self) -> IterativePhase1Config

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for IterativePhase1Config

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for IterativePhase1Config

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for IterativePhase1Config

fn eq(&self, other: &IterativePhase1Config) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for IterativePhase1Config