Have you ever been asked if you can achieve zero bugs in a product? A younger me would have laughed and said it’s not possible, but not all projects are the same. We once worked on a military project where budgeting is on another level and where there was no expense spared starting from documentation and planning (both under heavy testing and monitoring). Or you might be dealing with the medical industry, where a bug doesn’t mean an angry customer but the difference between life and death.