Thanks msmithson for your suggestion!
I do realize the email alternative to alert but I need this alert mechanism for specific purpose. In our situtation, we see there are lots of mail circulated from QC and most of times it leads no action from assigned person. I want to have this alert as reference in system itself with list of changes and act as barrier for assigned person to take necessary action on it before deciding to update the ticket status.
Thanks again for replying!