Function stagedControlChart

Returns {
    baseline: undefined;
    center: number;
    companion?:
        | QualityChart
        | {
            baseline?: number;
            center: number;
            companion?: QualityChart;
            estimator?: WithinEstimate
            | { label: string };
            h?: number;
            k?: number;
            L?: number;
            lambda?: number;
            outOfControl: number[];
            points: QualityPoint[];
            processMean?: number;
            processSigma?: number;
            rate?: number;
            rules: NelsonRule[];
            sigma: number;
            sigmaZ?: number;
            signals: { index: number; rules: NelsonRule[] }[];
            stages: Record<string, unknown>[];
            type: string;
        };
    estimator?: WithinEstimate
    | { label: string };
    h?: number;
    k?: number;
    L?: number;
    lambda?: number;
    outOfControl: number[];
    points: QualityPoint[];
    processMean?: number;
    processSigma?: number;
    rate?: number;
    rules: NelsonRule[];
    sigma: number;
    sigmaZ?: number;
    signals: { index: number; rules: NelsonRule[] }[];
    stages: Record<string, unknown>[];
    type: string;
}