Which role is explicitly defined as an administrator role?

The role that is explicitly defined as an administrator role is the System Administrator. This role is typically responsible for managing and overseeing the technical aspects of a system, including user permissions, system configurations, and maintenance of data integrity. The System Administrator has the authority to make crucial system-level changes and monitor overall system performance.

In contrast, while the HR Manager and User Manager may have administrative responsibilities within their specific domains, such as managing employee data or overseeing user roles and permissions, they do not encompass the broader technical oversight and operational capabilities associated with the System Administrator role. The Approver, on the other hand, is usually tasked with authorizing specific processes or transactions rather than managing the system itself. Therefore, the System Administrator is uniquely positioned with explicit responsibilities that define it as an administrator role.