Approval for Deviation from Budget

Hi, We are implementing the approval workflow for our budgets. I am testing the SAP deviation from budget template in 8.8. However, it appears to only activate when it deviates from the annual budget. Can I set an approval process for when the document deviates from the monthly budget?

Or better yet, is there a way to set the approval process for all documents that have a GL account associated with a budget so the controller can approval all expense related documents.

Thanks,

Jane