Here we would like to draw your attention to OKI1 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).OKI1 is a transaction code used for Activity numbers for activity types in SAP.
It comes under the package KSDI.
Transaction OKI1 technical data table
|Purpose||Activity numbers for activity types|