Change management can be implemented in Calem Enterprise - see this blog. A change is created, pre-approved, reviewed, approved and executed. In Calem Enterprise release R2019a editing is limited to change owner team and manager team once a change is approved. This is to prevent unwarranted modification to approved changes. A prompt dialog is shown when editing is not allowed. 

  • For instance, a user tries to add an attachment to an approved change. A dialog is shown if the user is neither a change owner nor a change manager.