Do you want to define the quality of the QC/TD release, or your own company's release? I am not aware of any "Platform" which can do this. There are so many variables by which you might want to define quality or acceptability. Many tools can help you make that decision but you have to know what you are looking for first. Would it be all of these qualities: Speed, Reliability, Performance, Usability, functionality, and several others or just one of these?
Success is the ability to go from one failure to another with no loss of enthusiasm.
~ Winston Churchill ~
I usually include an exit criteria in the Test Plan, some of this is based on number and severity of open defects. QC can then recommend what should be done based on the Test plan criteria. End User or End User representative is included in team who make the final decision to move and the end user quite often overrides the exit criteria.
I have not failed. I've just found 10,000 ways that won't work" --Thomas Edison