NpChart is an np-chart for monitoring the number of defects when defects are not rare.
Namespace:
Imsl.Chart2D.QCAssembly: ImslCS (in ImslCS.dll) Version: 6.5.0.0
Syntax
C# |
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[SerializableAttribute] public class NpChart : ShewhartControlChart |
Visual Basic (Declaration) |
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<SerializableAttribute> _ Public Class NpChart _ Inherits ShewhartControlChart |
Visual C++ |
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[SerializableAttribute] public ref class NpChart : public ShewhartControlChart |
Remarks
Control limits are computed using the binomial distribution. If defects are rare CChart should be used instead.
The control limits are at
where p is the is the proportion of defective items, n is the sample size, and k is the value of the "ControlLimit" attribute for the line. 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 limits can be added. The method AddWeco adds control limits with k = -2, -1, 1, 2.The lower control limit is forced to have a minimum value of zero. The y-axis labels are formatted as integers.
Inheritance Hierarchy
System..::.Object
Imsl.Chart2D..::.AbstractChartNode
Imsl.Chart2D..::.ChartNode
Imsl.Chart2D..::.Data
Imsl.Chart2D.QC..::.ShewhartControlChart
Imsl.Chart2D.QC..::.NpChart
Imsl.Chart2D..::.AbstractChartNode
Imsl.Chart2D..::.ChartNode
Imsl.Chart2D..::.Data
Imsl.Chart2D.QC..::.ShewhartControlChart
Imsl.Chart2D.QC..::.NpChart