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ProcessCapability Class

Computes the process capability parameters Cp, Cpm, Cp for normally distributed data. If the data is not normal the Box-Cox transform can be used.
Inheritance Hierarchy
SystemObject
  CenterSpace.NMath.CoreProcessCapability

Namespace:  CenterSpace.NMath.Core
Assembly:  NMath (in NMath.dll) Version: 7.4
Syntax
public class ProcessCapability

The ProcessCapability type exposes the following members.

Constructors
  NameDescription
Public methodProcessCapability(DoubleVector, Int32, Double, Double)
Computes the process capability parameters Cp, Cpm, Cp for normally distributed data. Target is taken to be the mean the upper and lower specification limits.
Public methodProcessCapability(DoubleVector, Int32, Double, Double, Double)
Computes the process capability parameters Cp, Cpm, Cp for normally distributed data.
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Properties
  NameDescription
Public propertyCI95
Confidence interval that 95% of the time the process mean will reside within this given interval.
Public propertyCp
Process capability.
Public propertyCpk
Process capability index.
Public propertyCpm
Taguchi capability index.
Public propertyIQR
Interquartile range using the Minitab interpolation method.
Public propertyProcessSigma
Estimate of the process standard deviations used to compute Cp, Cpk, and Cpm.
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Fields
  NameDescription
Protected fieldStatic memberc4_
c4 table for sample size from 2 to 10
Protected fieldStatic memberd2_
D2 table for sample size from 1 to 25.
Protected fieldStatic memberd2s_
D2_star table for sample size from 2 to 14 to 15 and over.
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Remarks
This standard deviation is computed using the mean of the ranges method. This estimate is refered to the "UWAVE-R" method in the R qcc package.
See Also