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Simultaneous Univariate X-bar Charts to Control Bivariate Processes with Autocorrelated Data
(2015-12-01)
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 ...
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 ...
The T2 chart with mixed samples to control bivariate autocorrelated processes
(2016-06-02)
In this paper, we propose the use of the T2 chart with the mixed sampling strategy (MS) to monitor the mean vector of bivariate processes with observations that fit to a first-order vector autoregressive model. With the ...
The skipping strategy to reduce the effect of the autocorrelation on the T (2) chart's performance
(Springer, 2015-10-01)
In this article, we consider the T (2) control chart for bivariate samples of size n with observations that are not only cross-correlated but also autocorrelated. The cross-covariance matrix of the sample mean vectors were ...
A new sampling strategy to reduce the effect of autocorrelation on a control chart
(2014-01-01)
On-line monitoring of quality characteristics is essential to limit scrap and rework costs due to bad quality in a manufacturing process. In several manufacturing environments, during production process data can be massively ...
Economic design of Shewhart control charts for monitoring autocorrelated data with skip sampling strategies
(Elsevier B.V., 2014-05-01)
On-line monitoring of process variability is strategic to achieve high standards of quality and maintain at acceptable levels the number of nonconforming items. Shewhart control charts are the simplest Statistical Process ...
Diseño de construcción de un autocorrelador de pulsos de femtosegundos usando absorción de dos fotones en un diodo luminiscente
(Revista Mexicana de Física, 2009)
GEOGRAPHIC-VARIATION IN APIS-CERANA-INDICA F - A SPATIAL AUTOCORRELATION ANALYSIS OF MORPHOMETRIC PATTERNS
(Int Bee Research Assoc, 1993-01-01)
Spatial patterns of morphometric variation in Apis cerana indica were analysed. Factor and spatial autocorrelation analyses were applied to 29 characters, measured in 17 populations in India. Correlograms showed that 15 ...
Geographic variation in Apis cerana indica F.: A spatial autocorrelation analysis of morphometric patterns
(1993-01-01)
Spatial patterns of morphometric variation in Apis cerana indica were analysed. Factor and spatial autocorrelation analyses were applied to 29 characters, measured in 17 populations in India. Correlograms showed that 15 ...