Quality and Reliability Methods - SAS

144 Capability Analyses Chapter 9
Launch the Platform
Capability Box Plots( 1 ),
Spec Limits(
OZONE( LSL( 0 ), Target( 0.05 ), USL( 0.1 ) ),
CO( LSL( 5 ), Target( 10 ), USL( 20 ) ),
SO2( LSL( 0 ), Target( 0.03 ), USL( 0.08 ) ),
NO( LSL( 0 ), Target( 0.025 ), USL( 0.6 ) )
)
);
Using a Limits Data Table
A spec limits table can be in two different formats: wide or tall. Figure 9.3 shows an example of both types.
Figure 9.3 Tall (top) and Wide (bottom) Spec Limit Tables
A tall table has one row for each column analyzed in Capability, with four columns. The first holds the
column names. The other three columns need to be named, _LSL, _USL, and _Target.
A wide table has one column for each column analyzed in Capability, with three rows plus a _LimitsKey
column. In the _LimitsKey column, the three rows need to contain the identifiers _LSL, _USL, and _Target.
Either of these formats can be read using the Import Spec Limits command.
Using a Limits Table and JSL
There is no extra syntax needed to differentiate between the two table types when they are read using JSL.
The following syntax works for either table. It places the spec limits inside an Import Spec Limits()
clause.
// JSL for reading in a spec limits file
Capability(
Y( :OZONE, :CO, :SO2, :NO ),
Capability Box Plots( 1 ),
Spec Limits(
Import Spec Limits(
"/filename.JMP"
)));