Process never trumps communication. IME speaking up is a valid approach. If you can't convince management either you are wrong, or the management is (you might

Process never trumps communication. IME speaking up is a valid approach. If you can't convince management either you are wrong, or the management is (you might not know the whole story, f.e. cash flow issues and knowing you can only close a client if you have feature y). Figure out what the situation is, and either realize you were wrong, try to convince them with better arguments or GTFO.