XbarR is an X-bar chart for monitoring a process using sample ranges.
Namespace:
Imsl.Chart2D.QCAssembly: ImslCS (in ImslCS.dll) Version: 6.5.0.0
Syntax
C# |
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[SerializableAttribute] public class XbarR : ShewhartControlChart |
Visual Basic (Declaration) |
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<SerializableAttribute> _ Public Class XbarR _ Inherits ShewhartControlChart |
Visual C++ |
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[SerializableAttribute] public ref class XbarR : public ShewhartControlChart |
Remarks
The control limits are at
where is the grand mean of all of the observations, is the mean of the observed ranges, n is the sample size, and k is the value of the "ControlLimit" attribute for the limit. Additionally, , where R is the range of data from a Gaussian distribution. Therefore is an estimate of the within sample standard deviation.By default, the chart contains an upper control limit with k=3, a lower control limit with k=-3, and a central line equal to . Additional 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..::.XbarR
Imsl.Chart2D..::.AbstractChartNode
Imsl.Chart2D..::.ChartNode
Imsl.Chart2D..::.Data
Imsl.Chart2D.QC..::.ShewhartControlChart
Imsl.Chart2D.QC..::.XbarR