Explanation
Ref:
https://docs.oracle.com/en/cloud/saas/project-portfolio-management/19a/fapfm/implementing-project-financial-m Topic - Entering Planning Resource Breakdown Structure Details
* Click Navigator > Setup and Maintenance, and search for the Manage Planning and Billing Resource Breakdown Structures task.
* Click the Manage Planning and Billing Resource Breakdown Structures link.
Use the Manage Planning and Billing Resource Breakdown Structures page to create new planning resource breakdown structures and to review existing planning and billing resource breakdown structures.
* Click the Create icon in the Planning Resource Breakdown Structures section.
* Use the Create Planning Resource Breakdown Structure: Basic Information page to provide basic resource breakdown structure information including the name, active dates, and project unit.
* Enter a planning resource breakdown structure name and select a date from which the resource breakdown structure is available for use.
* Optionally, provide a description and a date to which the planning resource breakdown structure is available for use.
* Select a project unit. Only projects created for the selected project unit can use this planning resource breakdown structure.
* If you want to allow project managers to add planning resources at the project level, then select the Allow resource changes at project level Tip: Changes at the project level don't move back to the parent planning resource breakdown structure.
Deselect this option to ensure all project using the planning resource breakdown structure use the same resources.
* Optionally, select a Job Set as a source of jobs for creating planning resources on your planning resource breakdown structure.
* Click Save.