Page Customization to freeze the Goal Name once manager approved

Summary

Page Customization not to edit the Goal Name once manager approved

Content

Hello Everyone,

Has anyone done page customization on goals ? There is a requirement where the employee should not be able to edit the Goal Name and other key goal attributes once the manager approved the goal. 

Business Scenario :

The employee should not be able to edit a key goal attribute once a goal is added and approved by the manager. They want to reduce the effort of manager approving the changes done by employees for a goal key attributes such as goal name, description. The customer is using both the top-down and bottom-up approaches.