Quality Assurance - Why Should the Whole Process Be Formalized?

One of the goals or one of the positive outcomes of having quality assurance is that ultimately it reduces the need for quality control. The first time you do this, you send it through the process and you get to quality control and realize there are actually still a bunch of errors in this course. You wouldn't be able to now go back and say, well, how can we adjust our quality assurance process to prevent these types of errors? It's easy to just go ahead and fix it and forget about it, you know, and think you forget that this was an issue that came up. If you formalize it, document it, what's the saying? What gets what gets done?