That's why it is called an estimate. It is how much you think it might take, not the exact amount of time. When asked about how long something it is going to t

That's why it is called an estimate. It is how much you think it might take, not the exact amount of time. When asked about how long something it is going to take, everyone is given an estimate, not an absolute value. And this is because a lot of things can happen in between that are out of everyone's control.