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2.1.24.4.55 QCD4


Contents

Description

Quality Control D4 Factor.

Syntax

double QCD4( UINT nn )

Parameters

nn
[input] Sample or subgroup size where nn>0.

Return

Quality Control D4 Factor for determining the 3-sigma upper control limit for R charts (Range of Sample Charts) from the average range. The Upper Control Limit for R=(factor)*(Average Range). The calculations for the factors are based on the normal distribution.

Examples

EX1 

void QCD4_ex1()
{
    UINT nn=11;
    double dD4;
    dD4=QCD4(nn); // results in dD4==1.744
}

Remark

Quality Control D4 Factor.

See Also

QCD2, QCD3

Header to Include

origin.h

Reference