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Showing 1 to 2 of 2 for “"Multivariate EWMA"”.
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Control Charts with Missing Observations
… in Exponentially Weighted Moving Average (EWMA) and Multivariate EWMA (MEWMA) control charts. The standardized sample mean is used since this adjusts the sample mean for the fact that part of the sample may be missing. It also allows for constant control limits even though the sample size …
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GLR Control Charts for Monitoring the Mean Vector or the Dispersion of a Multivariate Normal Process
… These quality variables usually follow a multivariate normal (MN) distribution. This dissertation discusses the monitoring of the mean vector and the covariance matrix of MN processes. The first part of this dissertation develops a statistical process control (SPC) chart based on a …