Here we would like to draw your attention to OIZ1 transaction code in SAP. As we know it is being used in the SAP PM (Plant Maintenance) module. OIZ1 is a transaction code used for WrkCtrCategory. by ApplicType in SAP.
It comes under the package INSC.
Transaction OIZ1 technical data table
|Purpose||WrkCtrCategory. by ApplicType|