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