hi,
if you need a proper business approval process, QGM is the best option, where all the change manager and CAB all involved works very similar to the approval procedure,check
FAQ on Quality Gate Management (QGM) and ChaRM Integration in SAP Solution Manager 7.1
but if you want more simple, just to pause the flow try out by creation one more action after successfully tested check out
Change Request Management (ChaRM) - How to enhance the standard workflow - SAP IT Service Managem...
Thanks
Jansi