Page 601 - Design for Six Sigma a Roadmap for Product Development

556 Chapter Fifteen

A B C D E FG H I
2.82

2.74
Beta 2.66

2.58
2.50

1 2 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3
Figure 15.13 Main-effects plot—LS means for beta.

We then analyze the effect of control factors on sensitivity, β; we get the
main-effects chart in Fig. 15.13.
The control factor level means for sensitivity is
Least Squares Means for beta
A Mean SE Mean
1 2.664 0.04589
2 2.679 0.04589
B
1 2.582 0.05621
2 2.822 0.05621
3 2.612 0.05621
C
1 2.782 0.05621
2 2.607 0.05621
3 2.627 0.05621
D
1 2.595 0.05621
2 2.673 0.05621
3 2.747 0.05621
E
1 2.625 0.05621
2 2.688 0.05621
3 2.702 0.05621
FG
1 2.618 0.05621
2 2.688 0.05621
3 2.708 0.05621
H
1 2.753 0.05621
2 2.562 0.05621
3 2.700 0.05621
I
1 2.747 0.05621
2 2.802 0.05621
3 2.467 0.05621

The mean of beta is

Mean of beta = 2.6717