Quality Management 2017

Performance indicators : Calculation of Pp, Ppk and Ppm

Related to the specifications

Related to the target

Ppm

Pp

Ppk

Interval ion Specificat

Dispersion

Dispersion + position

Ppm







2





2

X

target

6



- 

D

) LSL X X USL Min

2 1

(

-

);

(

-

 6 ion Specificat

Ppk

 

Pp 

D

3



Pp

Ppm



2

(91 Pp

) -  Ppk

X

Loss Fonction L = K(X-Target)²

Specification

USL

LSL.

USL

USL

LSL.

LSL

D1

D2

Target

Target

Dispersion

Dispersion

Dispersion

Target and specifications concern each throw (not a sample of n throws) => to calculate the performance indicators: use  of the individual throws’ results .

03/10/17

Target = 250cm

Remember:

LSL = 220cm

USL = 280cm

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