StatControlCharts.QCCapIndexes Function

Process Capability indexes p, Cp and Cpk.

Pascal

procedure QCCapIndexes(const Data: TVec; const LB: double; const UB: double; out p: double; out CP: double; out CPK: double; var CPConfInt: TTwoElmReal; var CPKConfInt: TTwoElmReal; Alpha: double = 0.05);

File

StatControlCharts

Parameters

Parameters	Description
Data	Process data.
LB	Lower specification limit. LB and UB are boundaries within which measurements on a product characteristic must lie.
UB	Upper specification limit. LB and UB are boundaries within which measurements on a product characteristic must lie.
p	Returns calculated significance.
CP	Returns capability index.
CPK	Returns capability index for uncentred process.
CPConfInt	Returns 100*(1-Alpha) Cp confindence interval.
CPKConfInt	Returns 100*(1-Alpha) CPK confidence interval.
Alpha	Desired significance level.

Description

Calculates the Process Capability indexes p, Cp(aka CPR) and Cpk(AKA CPRk).

Example

In the following example capability indexes and their condifence are calculated.

Uses StatControlCharts, MtxExp, Math387;
procedure Example;
var Data: Vector;
    p, lb, ub,cp, cpk: double;
    CPConfInt, CPKConfInt: TTwoElmReal;
begin
  Data.LoadFromFile('PCDATA.vec');
  QCCapIndexes(Data,lb,ub,p,cp,cpk,CPConfInt,CPKConfInt, 0.05);
end;

#include "MtxExpr.hpp"
#include "StatControlCharts.hpp"
#include "Math387.hpp"
void __fastcall Example();
{
    sVector Data;
    double p, lb, ub,cp, cpk;
    TTwoElmReal CPConfInt;
    TTwoElmReal CPKConfInt;
    Data.LoadFromFile("PCDATA.vec");
    QCCapIndexes(Data,lb,ub,p,cp,cpk,CPConfInt,CPKConfInt, 0.05);
}

StatControlCharts, Functions, Example

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