Because if you haven't built it yet, you can't ship it already. But you are right that estimates are for managers. Managers should watch their reporter's progr

Because if you haven't built it yet, you can't ship it already. But you are right that estimates are for managers. Managers should watch their reporter's progress and use that as evidence to build evidence. If the first task of 20 took 1 week, it's a 2year project. Update estimate as time and progress and work remaining increases.