XbarS is an X-bar chart for monitoring a process using sample standard deviations.
Namespace:
Imsl.Chart2D.QCAssembly: ImslCS (in ImslCS.dll) Version: 6.5.0.0
Syntax
C# |
---|
[SerializableAttribute] public class XbarS : ShewhartControlChart |
Visual Basic (Declaration) |
---|
<SerializableAttribute> _ Public Class XbarS _ Inherits ShewhartControlChart |
Visual C++ |
---|
[SerializableAttribute] public ref class XbarS : public ShewhartControlChart |
Remarks
The control limits are at
where is the grand mean of all of the observations, n is the sample size, and k is the value of the "ControlLimit" attribute for the limit. Additionally, is a factor such that is an unbiased estimator of the within sample 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 . Additional control limit lines 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..::.XbarS
Imsl.Chart2D..::.AbstractChartNode
Imsl.Chart2D..::.ChartNode
Imsl.Chart2D..::.Data
Imsl.Chart2D.QC..::.ShewhartControlChart
Imsl.Chart2D.QC..::.XbarS