Here we would like to draw your attention to OPIG transaction code in SAP. As we know it is being used in the SAP PS-COS (Costs in PS) component which is coming under PS module (Project Systems).OPIG is a transaction code used for View Maint.: Compound Int. Periods in SAP.
It comes under the package KAPI.
Transaction OPIG technical data table
|Purpose||View Maint.: Compound Int. Periods|