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The S chart with variable charting statistic to control bi and trivariate processes
(2017-11-01)
In this article, we propose the S chart with variable charting statistic to control the covariance matrix as an alternative to the use of the bivariate |S| chart and the trivariate VMAX chart. As usual, samples are regularly ...
Joint control charts for monitoring location and dispersion
(Int Soc Sci Appl Technol, 2008-01-01)
The T-2 and the generalized variance vertical bar S vertical bar charts are used for monitoring the mean vector and the covariance matrix of multivariate processes. In this article, we propose for bivariate processes the ...
Joint control charts for monitoring location and dispersion
(2008-12-01)
The T2 and the generalized variance |S| charts are used for monitoring the mean vector and the covariance matrix of multivariate processes. In this article, we propose for bivariate processes the use of the T2 and the VMAX ...
Joint control charts for monitoring location and dispersion
(Int Soc Sci Appl Technol, 2014)
Joint control charts for monitoring location and dispersion
(Int Soc Sci Appl Technol, 2014)
Monitoring the covariance matrix of bivariate processes with the DVMAX control charts
(2022-01-01)
Two versions of Phase II attribute+variable (DVMAX) control charts are investigated for monitoring the covariance matrix (Formula presented.) of bivariate processes. Monitoring always starts with an attribute chart employing ...
Gráfico de controle de VMAX para o monitoramento da matriz de covariâncias
(Associação Brasileira de Engenharia de Produção, 2008-01-01)
Neste artigo é proposto, para o monitoramento de processos normais bivariados, um gráfico de controle baseado nas variâncias amostrais de duas características de qualidade. Os pontos plotados no gráfico correspondem ao ...
Gráfico de controle de VMAX para o monitoramento da matriz de covariâncias
(Associação Brasileira de Engenharia de Produção, 2008-01-01)
Neste artigo é proposto, para o monitoramento de processos normais bivariados, um gráfico de controle baseado nas variâncias amostrais de duas características de qualidade. Os pontos plotados no gráfico correspondem ao ...
Monitoring the covariance matrix with the VMAX chart
(Int Soc Sci Appl Technol, 2008-01-01)
In this article, we propose a new statistic to control the covariance matrix of bivariate processes. This new statistic is based on the sample vat-lances of the two quality characteristics, shortly VMAX statistic. The ...
Monitoring the covariance matrix with the vmax chart
(2008-12-01)
In this article, we propose a new statistic to control the covariance matrix of bivariate processes. This new statistic is based on the sample variances of the two quality characteristics, shortly VMAX statistic. The points ...