Can you please help by either sharing a document or providing step by step detail of how to implement User Management in EBS to achieve following functionalities :

1. Administrators should be able to register New Users(Add New User) in org who are already created as user in HRMS with folowing required details : 
   1. First Name
   2. Last Name
   3. User Id
   4. Email Id
2. Expire/Disable a User in Base.
3. Request for Additional Responsibility (both New and Existing User) using Self Service portal but with multi – level approval routing.          
4. Notification at each step is required.

I have gone through multiple documents provided by Oracle which includes Securitization as well but couldn’t find a solution to achieve this task in a step-by step detailed manner as the steps provided a very high level overview.