The idea is to test the access that each of the users under such roles would obtain.
As such you should:
Modify the different access in "Role -> List"
Add any selective access requirements
Change your role within "Users" tab and DO NOT remove your workspace administrator. You will note that many of the contents previously available will not longer show and you could see whether all the modules remain accessible in an usable way or the access you provided made some modules malfunction.