How can a manager be notified that a time card from a direct report has been approved on his/her beh

Summary

No notification is sent to manager when a time card is approved from Time Management

Content

We are looking for a way to leverage the Time Management functionality to improve our time approval process. We would like to allow mass approval of certain submitted time cards where the time entry is predictable and reasonable (e.g.: administrative employees). The one thing that is preventing us to move forward with this functionality is that there are no notifications to managers when a time card for a direct report is approved from Manage Time Cards in Time Management.  

Does anybody know how to enable notifications to managers when a time card (from their direct reports) is approved from the Manage Time Cards screen?