XmR is an XmR chart for monitoring a process using moving ranges.
Namespace:
Imsl.Chart2D.QCAssembly: ImslCS (in ImslCS.dll) Version: 6.5.0.0
Syntax
C# |
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[SerializableAttribute] public class XmR : ShewhartControlChart |
Visual Basic (Declaration) |
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<SerializableAttribute> _ Public Class XmR _ Inherits ShewhartControlChart |
Visual C++ |
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[SerializableAttribute] public ref class XmR : public ShewhartControlChart |
Remarks
The moving range control chart uses the moving range of two successive observations to measure the process variability. This control chart is used for individual measurements (sample size = 1).
The moving range is defined to be .
The control limits are at
where is the mean of all of the individual observations, is the mean of the moving averages, and k is the value of the "ControlLimit" attribute for the line. Additionally, where R is the range of a Gaussian distribution. Therefore is an estimate of the standard deviation.By default, the chart contains an upper control limit line with k=3, a lower control limit line with k=-3, and a central line equal to . Additionally control limits can be added. The method AddWeco adds control limits with k = -2, -1, 1, 2.
Inheritance Hierarchy
System..::.Object
Imsl.Chart2D..::.AbstractChartNode
Imsl.Chart2D..::.ChartNode
Imsl.Chart2D..::.Data
Imsl.Chart2D.QC..::.ShewhartControlChart
Imsl.Chart2D.QC..::.XmR
Imsl.Chart2D..::.AbstractChartNode
Imsl.Chart2D..::.ChartNode
Imsl.Chart2D..::.Data
Imsl.Chart2D.QC..::.ShewhartControlChart
Imsl.Chart2D.QC..::.XmR