Here we would like to draw your attention to OOPB transaction code in SAP. As we know it is being used in the SAP PA-OS (Organizational Structure in PA) component which is coming under HR (HCM) PA module (Personnel Management). OOPB is a transaction code used for User groups in SAP.
It comes under the package for Organization and planning (application) (PP00). When we execute this transaction code, is the normal standard SAP program that is being executed in background. Transaction code OOPB is included in the SAP component for SAP_HR.
Transaction OOPB technical data table