Struct PercentileCapabilityResult 

pub struct PercentileCapabilityResult {
    pub cp_star: Option<f64>,
    pub cpk_star: Option<f64>,
    pub cpu_star: Option<f64>,
    pub cpl_star: Option<f64>,
    pub median: f64,
    pub percentile_lower: f64,
    pub percentile_upper: f64,
    pub model: CapabilityModel,
    pub fit: FitResult,
}

Result of percentile-based process capability analysis.

Fields

cp_star: Option<f64>

Cp* = (USL − LSL) / (X₉₉.₈₆₅ − X₀.₁₃₅). Requires both limits.

cpk_star: Option<f64>

Cpk* = min(Cpu*, Cpl*). Requires at least one limit.

cpu_star: Option<f64>

Cpu* = (USL − X₅₀) / (X₉₉.₈₆₅ − X₅₀). Requires USL.

cpl_star: Option<f64>

Cpl* = (X₅₀ − LSL) / (X₅₀ − X₀.₁₃₅). Requires LSL.

median: f64

Median of the fitted distribution, X₅₀.

percentile_lower: f64

0.135 % quantile of the fitted distribution (lower natural process limit).

percentile_upper: f64

99.865 % quantile of the fitted distribution (upper natural process limit).

model: CapabilityModel

The family the quantiles come from — never CapabilityModel::Auto.

fit: FitResult

The fit the quantiles come from: its parameters (as FitResult::parameters names them) and likelihood. Pass it to goodness_of_fit to judge whether the family describes the data — the indices mean nothing when it does not.

Trait Implementations

impl Clone for PercentileCapabilityResult

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PercentileCapabilityResult

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

Formats the value using the given formatter.