I am not sure this is the right question to ask. The problem is that you can build an elaborate maze of QA checks and still miss problems like these (and kill

I am not sure this is the right question to ask. The problem is that you can build an elaborate maze of QA checks and still miss problems like these (and kill the company's ability to innovate in the process). The reasons why you have (or don't have) various QA processes are much more interesting than the processes themselves.