Using JMP - SAS

158 Set Column Properties Chapter 5
Assign Column Properties
• Specify one of the possible goals for a DOE response variable. Choose from the following: Maximize,
Match Target, Minimize, or None. For example, if you are in the Prediction Profiler, and you want the
desired value to be close to zero, select Match Target.
• If you have two responses, you can enter an Importance value, which specifies how to weigh the
importance of one response against the other response.
• Specify values for the lower, middle, and upper limits and desirability values.
• To draw specification limits as reference lines on a graph, select the Show as graph reference lines
option.
Design Role
Specify a design roll to indicate how to use a factor column in a model to design an experiment.
Factor Changes
Sigma
To create a split plot design using the JMP DOE commands, you must identify a factor as hard, meaning
that the factor would be difficult to change. You can identify a factor as hard in the DOE design pane each
time you design an experiment. To create a split plot design every time you use a certain factor, you can save
time by setting up that factor to be hard in all experiments.
Use the Sigma property to enter a known sigma value. This value is used by applications such as control
charts or any application that requires a sigma value to complete computations. If no sigma value is
supplied, sigma is calculated from the sample.
Units
Use the Units property to specify the measurement units that were used to collect the data for the column.
The units appear in parenthesis after the column name. For example, you might want a column to indicate
that age values are measured in months, or that a monetary value is in thousands of dollars.
Distribution
For a column that contains continuous numeric data, use the Distribution property to select a distribution
type to fit to the column. When you run the Distribution report (Analyze > Distribution) for the column,
JMP automatically estimates a fit using the specified distribution. A curve reflects when the data completely
fits the specified distribution.
Set the Distribution property only when you already know how the data is distributed. For example, you
might already know before you run Analyze > Distribution that the data has a Weibull distribution.
If you set the Distribution property and the Spec Limits property, then the Distribution report produces a
Capability Analysis report, reflecting the distribution type that you selected for the column.