The factors and their settings are given in the data table Phone Factors.jmp. Create a Strength 2 covering array by following these steps.
1.
Select Help > Sample Data Library and open Design Experiment/Phone Factors.jmp.
The Phone Factors.jmp data table contains the factors and their settings.
2.
Select DOE > Special Purpose > Covering Array.
Notice that the menu next to Strength: t = , is set to 2 by default.
Figure 19.10 Factors Outline for Phone Factors
4.
Click Continue.
Restrict Factor Level Combinations
Specify Disallowed Combinations Using the Filter
1.
Select Use Disallowed Combinations Filter.
2.
From the Add Filter Factors list, select Near Phone and Near Interface and click Add.
3.
Hold down the Ctrl key and click ISDN under Near Phone and A under Near Interface.
Figure 19.11 Disallowed Combinations Panel Showing First Constraints
4.
5.
From the Add Filter Factors list, select Far Phone and Far Interface and click Add.
6.
Hold down the Ctrl key and click ISDN under Far Phone and A under Far Interface.
7.
8.
From the Add Filter Factors list, select Near Phone and Near Interface and click Add.
9.
Hold down the Ctrl key and click Bus and Res under Near Phone and B under Near Interface.
Figure 19.12 Completed Disallowed Combinations Filter
1.
Click Continue.
2.
Select Use Disallowed Combinations Script.
(Near Phone == "ISDN" & Near Interface == "A") |
(Far Phone == "ISDN" & Far Interface == "A")  |
(Near Phone == "Bus" & Near Interface == "B") |
(Near Phone == "Res" & Near Interface == "B")
Figure 19.13 Completed Disallowed Combinations Script Window
Construct the Design Table
3.
Click Make Design.
Figure 19.14 Metrics Outline for Phone Design
4.
Click Make Table.
Figure 19.15 Covering Array Design Table

Help created on 7/12/2018