EWMA CHART BASED ON THE EFFECTIVE VARIANCE FOR MONITORING THE VARIABILITY OF MULTIVARIATE QUALITY CONTROL PROCESS CARTA EWMA CON VARIANZA EFECTIVA PARA MONITOREAR VARIABILIDAD EN PROCESOS DE CONTROL DE CALIDAD MULTIVARIADOS
When it is of interest monitoring small changes in the variability (and/or the mean) of a process, the EWMA control charts have shown to be very efficient. These charts, usually use the generalized variance as a measure of global variability, defined as the determinant of the variance covariance mat...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Universidad Nacional de Colombia
2008-05-01
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| Series: | Revista Colombiana de Estadística |
| Subjects: | |
| Online Access: | http://www.revistas.unal.edu.co/index.php/estad/article/view/29608 |