Page 141 - Six Sigma Advanced Tools for Black Belts and Master Black Belts

Char Count= 0
2:57
August 31, 2006
JWBK119-09
126 Computing Process Capability Indices for Nonnormal Data
Weibull (1.0, 1.0)
6

5

4

C pu 3

2
C pu = 1.5
1

Assumed Distribution Clements’ Johnson
normal free method transform
Probability Weighted Box-Cox Wright’s
plot variance transform index
Figure 9.13 Box plots of ˆ C pu for all methods (100 observations each) for Weibull (σ = 1.0,
η = 1.0) with target C pu = 1.5.

Weibull (1.0, 1.0)
7

6

5

4
C pu
3
2
C pu = 1.667
1

Assumed Distribution Clements’ Johnson
normal free tolerance method transform
Probability Weighted Box-Cox Wright’s
plot variance transform index

Figure 9.14 Box plots of ˆ C pu for all methods (100 observations each) for Weibull (σ = 1.0,
η = 1.0) with target C pu = 1.667.