Quality and Reliability Methods - SAS

Chapter 9 Capability Analyses 143
Launch the Platform
Launch the Platform
We use CitySpecLimits.jmp, Cities.jmp, and Semiconductor Capability.jmp in the following examples. To
launch the Capability platform, select Analyze > Quality and Process > Capability. This presents you with
the following dialog box.
Figure 9.2 Capability Launch Window
Here, you select the variables that you want to analyze. After assigning the desired variables to Y, Columns,
click OK to bring up the Specification Limits dialog. Columns selected in the launch dialog are listed here,
with entry fields for the lower specification limit (LSL), target, and upper specification limit (USL).
Entering Limits
Using JSL
At this point, specification limits should be entered for each variable. Note that manually adding the limits
at this point is only one of the available methods for entering them.
1. If the limits are already stored in a data table, they can be imported using the Import Spec Limits
command.
2. You can enter the limits as Column Properties, thereby bypassing the spec limits dialog.
3. You can enter the limits on the dialog.
4. You can enter them using JSL.
Spec limits can be read from JSL statements or from a spec limits table.
As an example of reading in spec limits from JSL, consider the following code snippet, which places the spec
limits inside a Spec Limits() clause.
// JSL for reading in spec limits
Capability(
Y( :OZONE, :CO, :SO2, :NO ),