
220 Six Sigma Case Studies with Minitab
®
better” option and click on “OK”. This takes you back to the dialog box shown
in Figure13.11. Click on “Graphs” and the dialog box shown in Figure13.13
opens. Ensure that “Signal to Noise ratios” and “Means” plots are selected.
Click on “OK” and it takes you back to the dialog box shown in Figure13.11.
Click on “OK” and the graphs shown in Figures13.14 and 13.15 are plotted.
FIGURE 13.4
Entry of factors and their levels.
Taguchi Design
Taguchi Orthogonal Array Design
L4(2**3)
Factors: 3
Runs: 4
Columns of L4(2**3) Array
1 2 3
FIGURE 13.5
Summary of Taguchi design.