It is not necessary to have access to the navigation menu option(s) for master data to be able to select these objects in other processes. E.g. end users most likely do not need to search for assets via the navigation menu, they only need to be able to select an asset in a new request or reservation. If contextual access to assets is NOT used (default behavior), users that have the authorization to create a request, reservation, visitor, purchase order, or any other process can also select any asset in those processes (if applicable in that process).