I always setup a dedicated QA team that has right of veto for releases. Developers indeed can do some testing, but quality assurance is more than that. It start

I always setup a dedicated QA team that has right of veto for releases. Developers indeed can do some testing, but quality assurance is more than that. It starts at the problem definition stage, when QA engineers ensure there’s no misunderstanding of the requirements, they make sense and they answer all important questions. It ends long after release, because production support is also part of QA. QA engineers do their part of testing, just like developers do, but they also coordinate delivery and support from quality perspective. Their feedback is often valuable to product managers and designers, they can help a lot your customer support team.