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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