The syntax for the SPEC statement is as follows:

You can use at most one SPEC statement in the CAPABILITY procedure. When you provide specification limits and target values in a SPEC statement, the tabular output produced by the PROC CAPABILITY statement includes process capability indices as well as summary statistics. You can use the SPEC statement in conjunction with the CDFPLOT, COMPHISTOGRAM, HISTOGRAM, PROBPLOT, and QQPLOT statements to add specification limit and target lines to the plots produced with these statements.