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X̄ charts with variable sample size
(1994-07-01)
The usual practice in using a control chart to monitor a process is to take samples of size n from the process every h hours. This article considers the properties of the X̄ chart when the size of each sample depends on ...
X̄ charts with variable sample size
(1994-07-01)
The usual practice in using a control chart to monitor a process is to take samples of size n from the process every h hours. This article considers the properties of the X̄ chart when the size of each sample depends on ...
A new sampling strategy for the Shewhart control chart monitoring a process with wandering mean
(Taylor &francis Ltd, 2015-07-18)
In many processes, such as in chemical and process industries, the observations of a quality characteristic to be monitored may be correlated, if sampling intervals are short. Correlation can be modelled by considering the ...
THE PRESENCE OF AUTOCORRELATION ON THE T-2 CONTROL CHART OF HAROLD HOTELLING
(Univ Federal Fluminense, Escola Engenharia, Dept Engenharia Producao, 2017-09-01)
The presence of autocorrelation violates the hypothesis of data independence used in statistical control charts in the manufacturing environment. This article examines graphically, using the Mahalanobis distance, the effect ...
Graficas : aplicación practica
(Servicio Nacional de Aprendizaje (SENA)Subdirección General de Operaciones. División de Programación Didáctica, 2019)