PR vs PO - Or why do I even need to give out employee center role.

We are working towards having every employee have a full access license in our company. We are a software company and use, basically, all aspects of NS. Case, Project and Issue, in particular are areas that are needed to be seen by everyone and so we need full licenses. One of the biggest confuse factors is the multiple roles that users, who maybe log in once a month, have to deal with. Some users have as many as 5 to work with. We are in the process of paring these down, hopefully to just one each.

The biggest use of employee center is entering PR's and ER's. The help and NS support reps, (at least 1st level) all say that employees should enter PR's in the employee center and that PR's become PO's once approved. That leads one to think of this transaction type to actually be two types. In reality it's the same record with a different label at the top of the page and some extra fields, as far as I can tell.