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  2. Standard CMMI Appraisal Method for Process Improvement

    en.wikipedia.org/wiki/Standard_CMMI_Appraisal...

    The suite of documents associated with a particular version of the CMMI includes a requirements specification called the Appraisal Requirements for CMMI (ARC), [2] which specifies three levels of formality for appraisals: Class A, B, and C. Formal (Class A) SCAMPIs are conducted by SEI-authorized Lead Appraisers who use the SCAMPI A Method Definition Document (MDD) [3] to conduct the appraisals.

  3. Confidence and prediction bands - Wikipedia

    en.wikipedia.org/wiki/Confidence_and_prediction...

    A 95% simultaneous confidence band is a collection of confidence intervals for all values x in the domain of f(x) that is constructed to have simultaneous coverage probability 0.95. In mathematical terms, a simultaneous confidence band f ^ ( x ) ± w ( x ) {\displaystyle {\hat {f}}(x)\pm w(x)} with coverage probability 1 − α satisfies the ...

  4. Process capability index - Wikipedia

    en.wikipedia.org/wiki/Process_capability_index

    The process capability index, or process capability ratio, is a statistical measure of process capability: the ability of an engineering process to produce an output within specification limits. [1] The concept of process capability only holds meaning for processes that are in a state of statistical control. This means it cannot account for ...

  5. Confidence interval - Wikipedia

    en.wikipedia.org/wiki/Confidence_interval

    A 95% confidence level does not mean that 95% of the sample data lie within the confidence interval. A 95% confidence level does not mean that there is a 95% probability of the parameter estimate from a repeat of the experiment falling within the confidence interval computed from a given experiment. [25]

  6. Six Sigma - Wikipedia

    en.wikipedia.org/wiki/Six_Sigma

    In other words, they assume that after the initial study determining the short-term sigma level, the long-term C pk value will turn out to be 0.5 less than the short-term C pk value. So, now for example, the DPMO figure given for 1 sigma assumes that the long-term process mean will be 0.5 sigma beyond the specification limit (C pk = –0.17 ...

  7. Process performance index - Wikipedia

    en.wikipedia.org/wiki/Process_performance_index

    Consider a quality characteristic with a target of 100.00 μm and upper and lower specification limits of 106.00 μm and 94.00 μm, respectively. If, after carefully monitoring the process for a while, it appears that the process is out of control and producing output unpredictably (as depicted in the run chart below), one can't meaningfully estimate its mean and standard deviation.

  8. What Is the Consumer Confidence Index and What’s It ... - AOL

    www.aol.com/consumer-confidence-index-mean...

    Anything above 100 represents an increase in consumer confidence. When the index dips below 100, it means that people are anxious and are likely to spend less in the near future in favor of ...

  9. Margin of error - Wikipedia

    en.wikipedia.org/wiki/Margin_of_error

    For a confidence level, there is a corresponding confidence interval about the mean , that is, the interval [, +] within which values of should fall with probability . Precise values of z γ {\displaystyle z_{\gamma }} are given by the quantile function of the normal distribution (which the 68–95–99.7 rule approximates).