Roberto Campos Leoni

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Control charts with adaptive schemes are tools used to monitor processes and to signal the presence of special causes. However, the use of adaptive schemes is not common yet because they are topics rarely covered in textbooks and are not available in traditional software used for statistical analysis. This work aims to present how to plan and estimate the(More)
In this article, we consider the simultaneous univariate X_bar charts (SU X_bar charts) for samples of n bivariate observation vectors that are not only cross-correlated but also autocorrelated. The cross-covariance matrix of the sample mean vectors was derived with the assumption that the observations are described by a first-order vector autoregressive(More)
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