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IMAGE imgs/statdistribns01.gif
IMAGE imgs/statdistribns02.gif IMAGE imgs/statdistribns05.gif IMAGE imgs/statdistribns07.gif

TAGUCHIVARIANCE

=S2

+(

IMAGE imgs/statdistribns329.gif

S2
T

T)2

Variance

about mean

Variance of

meanfromtarget

IMAGE imgs/statdistribns330.gif

NOTE:

s2=

Secondmomentabout mean

IMAGE imgs/statdistribns326.gif
IMAGE imgs/statdistribns331.gif

Secondmomentabout target

ST2=

N

*

Can be usedto separatethe amountof the "problem"due to:

- Deviationof meanfromtarget

(miscentered/mis-targeted)

IMAGE imgs/statdistribns332.gif

T)2

(

+

S2

from

-

Deviationof parts frommean

("Processvariability")

IMAGE imgs/statdistribns04.gif

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