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

Public Class ProcessCapability

public ref class ProcessCapability

type ProcessCapability = class end

The ProcessCapability type exposes the following members.

Constructors

	Name	Description
	ProcessCapability(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.
	ProcessCapability(DoubleVector, Int32, Double, Double, Double)	Computes the process capability parameters Cp, Cpm, Cp for normally distributed data.

Properties

	Name	Description
	CI95	Confidence interval that 95% of the time the process mean will reside within this given interval.
	Cp	Process capability.
	Cpk	Process capability index.
	Cpm	Taguchi capability index.
	IQR	Interquartile range using the Minitab interpolation method.
	ProcessSigma	Estimate of the process standard deviations used to compute Cp, Cpk, and Cpm.

Fields

	Name	Description
	c4_	c4 table for sample size from 2 to 10
	d2_	D2 table for sample size from 1 to 25.
	d2s_	D2_star table for sample size from 2 to 14 to 15 and over.

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.