Access Control maps users to roles and roles to permissions within an solution. Permissions on operations is create, read, update (edit), delete and execute (process).
To add a Access control, do the following:
Add a new role with a describing name , description and comments and save it.
Add users/groups to the role. Uses/groups can be imported from Active Directory.
Set permission on solution items for this role and save. Permissions is inherited to children when an option is checked. Check means access to operation.
Add additional roles as described in 1-3
Enable Access Control by setting 'Activate Access Control' to checked and save.