If you specify the SEVERITYTEST= and NPERTURBEDSAMPLES= options in the PROC HPCDM statement, and the SEVERITYTEST= data set contains an offset variable, the perturbation analysis results are incorrect.

To avoid the problem, create an item store in PROC SEVERITY and use the SEVERITYSTORE=SAS-item-store option instead of the SEVERITYTEST=SAS-data-set option in PROC HPCDM. In addition, the PROC SEVERITY step must satisfy at least one of the following two conditions:

• the SCALEMODEL statement contains an interaction effect or a class effect
• an OUTPUT statement in specified