After changes are made to improve a measurement process, a measurement systems analysis study is conducted to study repeatability and reproducibility with Part, Operator, and Instrument as factors. Each of three operators measures each of eight parts with four instruments. Of particular interest is the consistency of the instruments. The measured quantity is called new Y.
1.
Select Help > Sample Data Library and open Variability Data/3 Factors Crossed.jmp.
2.
Select Graph > Graph Builder.
3.
Select new Y and drag it to the Y zone.
4.
Select Part and drag it to the X zone.
5.
Drag Operator to the Color zone.
The new Y values are colored by Operator, using the legend at the right of the graph. It appears that Janet might be measuring higher values than the other two operators on most parts. But the Operator effect is not easy to visualize, so you create a separate Operator axis.
6.
Select Operator and drag it beneath Part in the X zone.
The label Operator/Part appears, indicating that Part is associated with the topmost axis, and Operator is associated with the lower axis.
Figure 2.16 Drag Operator to Add a Second Axis
7.
Select Instrument and drag it beneath Operator/Part in the X zone.
The label Instrument/Operator/Part appears, indicating that a third axis for Instrument has been added beneath the Operator axis.
Figure 2.17 Drag Instrument to Add a Third Axis
8.
Select Instrument and drag it to the Color zone.
Figure 2.18 Three Nested Axes
Now the new Y values are colored by Instrument, and it is easy to see Instrument differences.

Help created on 10/11/2018