In any organization, the process to request systems and applications access for a new user involves multiple paper forms, which must be correctly filled in and approved by multiple authorizers. Once these forms are completed and approved, the requested changes must be fulfilled by multiple security adminstrators, each of whom is responsible for systems of a single type.
This kind of change management can be quite slow. It is not unusual for new employees to wait days or weeks before they can access all of the systems and applications needed to do their job.
Using Identity Manager, organizations can reduce the time to activate a new user from days to hours -- limited only by the time it takes business users to approve the change request.