Is Cpm (Taguchi's Index) Superior to Cpk and Ppk?

C

cyberspider

#1
Cpm (Taguchi's Index ) Superior to Cpk and Ppk ?

Can someone discuss in detail, pros and cons of Cpm ?
 
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D

Darius

#2
cyberspider said:
Cpm (Taguchi's Index ) Superior to Cpk and Ppk ?

Can someone discuss in detail, pros and cons of Cpm ?
Cpm or Cpmk behave much better than cpk/ppk because it takes in account the target. In cases where only one spec is available the calculus of cpk/ppk is a nonesence, but the cpmk can be calculated.

There still all of them have the same problem with distributions that are far from gausian way (in such case; box-cox has shown better behabiur on simulations than other capability index).

Cpm is prefered to Cp because it measures process location and standard deviation.
 
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