You can assign projects or project views of the Implementation Guide (IMG) to a Customizing role. The purpose of such an assignment is to specifically generate the authorization for certain IMG activities and assign it to users.
If you are on the Menu tab page in the Role Maintenance transaction, you can assign projects or view from the Implementation Guide (IMG) by choosing Utilities → Customizing Auth. When the profile is generated, the system creates the authorization, which is necessary to perform all activities of the IMG projects/project views assigned.

Caution
If a project or project view has been assigned to a role, it is no longer possible to manually assign transactions to this role. This means that the role can only be used for generating and assigning Customizing authorizations. In the same way, a role to which transactions have been manually assigned cannot be used for Customizing authorizations.
The transactions of the project or project view are not displayed in the Session Manager and the "SAP Easy Access" menu. If the Enterprise IMG or Project IMG is changed, the authorization data of this role must be regenerated.
Hint
Since Customizing activities are performed on a project-related basis and for a limited period, you should maintain the end date for the assigned users. This ensures that the users assigned to the role lose the authorization for the projects/project views assigned upon completion of the project. This only applies, of course, if the user comparison is regularly performed.