Launch the Capability platform by selecting Analyze > Quality and Process > Capability.
The Capability Launch Window Using Semiconductor Capability.jmp
Produces a separate report for each level of the By variable. If more than one By variable is assigned, a separate report is produced for each possible combination of the levels of the By variables.
After clicking OK, the Spec Limits window appears if you have not specified limits for each variable. If you have specified limits in the data table, the report window appears. For more information about entering specification limits, see Specification Limits.
Specification limits should be entered for each variable in the data table. If you have not specified limits in your data table, the Spec Limits window appears after clicking OK on the launch window. Note that manually adding specification limits in the Spec Limits window is only one of the available methods for entering limits. The limits can be either in a JMP data table, referred to as the Limits Table, or stored as a column property in the process column. To implement specification limits, you can:
If the limits are already stored in a data table, they can be imported using the Import Spec Limits command from the Spec Limits window. See Limits Data Table for more information.
If you have not specified limits in your data table, the Spec Limits window appears after clicking OK on the launch window. Columns selected in the launch window are listed, with entry fields for the LSL, Target, and USL. Spec Limits Window for Cities.jmp displays the Spec Limits window for the Cities.jmp sample data table after selecting OZONE, CO, SO2, and NO as variables in the launch window. After entering the limits in the Spec Limits window, select Next to continue to the report window.
Spec Limits Window for Cities.jmp
You can also retrieve a limits data table with the Import Spec Limits option from the Spec Limits red triangle menu. Select Import Spec Limits and then select the appropriate data table that contains the specification limits for the analysis. After selecting the appropriate limits table, the values populate the window. Click Next to continue to the reports window.
All limits data tables must have a column for each of the variables whose values are the known standard parameters or limits. A limits data table can be in two different formats: wide or tall. Either you have a column for each response with the limits key or you have one column for each response and the limits key words are the columns. Either of these formats can be read using the Import Spec Limits command. Tall (top) and Wide (bottom) Spec Limit Tables shows an example of both types of limits data tables.
Tall (top) and Wide (bottom) Spec Limit Tables
A wide table has one column for each column analyzed in the Capability platform, with three rows plus a _LimitsKey column. In the _LimitsKey column, the three rows need to contain the identifiers _LSL, _USL, and _Target.
The easiest way to create a limits data table is to save results computed by the Capability platform. The Save Spec Limits command in the Capability red triangle menu automatically saves limits from the sample values. After entering or loading the specification limits, you can:
Save the limits to the data table using the Save Spec Limits as Column Properties command.
Save the limits to a new data table with the Save Spec Limits in New Table command.
When you perform a capability analysis, you do not have to re-specify the limits each time. Use the Column Properties > Spec Limits property in a data table to save specification limits as a column property. Saving these limits in a column also facilitates consistency from use to use. For example, you might run an analysis that uses these limits. When you come back later and change the data, you can run a new analysis on the new data using the same limits. Spec Limits Section of the Column Properties Window displays the Spec Limits section of the Column Properties window for OZONE in the sample data table Cities.jmp.
The Show as graph reference lines option draws specification limits as reference lines on a graph. For more information about column properties, refer to Using JMP.
Spec Limits Section of the Column Properties Window
The results, as displayed in Results for Cities.jmp, indicate that each value is possibly outside of the specification limits.
There is no extra syntax needed to differentiate between the two table types (wide and tall) when they are read using JSL. The following syntax works for either table. It places the spec limits data table inside an Import Spec Limits() expression. The CitySpecLimits.jmp sample data table can be used as the example (replace "<path>/filename.JMP" with "C:\Program Files\SAS\JMPPRO\11\Samples\Data\CitySpecLimits.jmp"or wherever you have the sample data stored on your computer) in the following script:
The results, as displayed in Results for Cities.jmp, indicate that each value is possibly outside of the specification limits.