columna API reference - v0.4.1
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    Interface NhppResult

    interface NhppResult {
        ci: { scale: [number, number]; shape: [number, number] };
        mtbf: number;
        n: number;
        scale: number;
        se: { scale: number; shape: number };
        shape: number;
        systems: number;
        test: "power-law NHPP (Crow–AMSAA)";
        totalTime: number;
        trend: {
            laplace: { pValue: number; statistic: number };
            milHdbk: { df: number; pValue: number; statistic: number };
        };
        ttt: { scaled: number; u: number }[];
        cumulative(t: number): number;
    }
    Index
    ci mtbf n scale se shape systems test totalTime trend ttt
    cumulative
    ci: { scale: [number, number]; shape: [number, number] }
    mtbf: number

    Instantaneous MTBF at the end of observation.

    n: number
    scale: number
    se: { scale: number; shape: number }
    shape: number

    Shape β (< 1 improving, > 1 deteriorating) and scale λ of the intensity λβt^{β−1}.

    systems: number
    test: "power-law NHPP (Crow–AMSAA)"
    totalTime: number

    Total observation time.

    trend: {
        laplace: { pValue: number; statistic: number };
        milHdbk: { df: number; pValue: number; statistic: number };
    }

    Trend tests: Laplace / MIL-HDBK-189 (H0: HPP).

    ttt: { scaled: number; u: number }[]

    Total time on test plot data.

    • Expected cumulative failures at t.

      Parameters

      • t: number

      Returns number

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