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Nonparametric multivariate covariance chart for monitoring individual observations
(
Elsevier
, 2022 , Article)
Parametric and nonparametric multivariate control charts that are proven very useful in monitoring the covariance matrix of multivariate normally or “nearly” normally distributed continuous datasets have been proposed in ...
Monitoring multivariate coefficient of variation for high-dimensional processes
(
John Wiley and Sons Ltd
, 2022 , Article)
Multivariate coefficient of variation (MCV) charts are effective tools for monitoring process relative variability. They are developed on the assumption that the process subgroup size available for monitoring the MCV ...