How do you know when you are done collecting requirements?

Answer 1

That's a good question. Your requirements need to be measurable to be complete. So it's not enough to write down that you want good performance in your product. You need to be able to tell people what measurement counts as good performance for you. You have to be able to confirm that all of your requirements are met when you close out your project, so you can't leave requirements up to interpretation. You know your requirements are complete when you've got a way to verify each of them once they're built