Here we would like to draw your attention to OCNPQ1 transaction code in SAP. As we know it is being used in the SAP PS-REV (Revenues and Earnings in PS) component which is coming under PS module (Project Systems).OCNPQ1 is a transaction code used for Customizing Invoicing Plan PS in SAP.
It comes under the package CNFP.
Transaction OCNPQ1 technical data table
|Purpose||Customizing Invoicing Plan PS|