Writing code and especially bug fixing issues with complicated code is not as deterministic, as most people imagine. And any developer knows that they should de

Writing code and especially bug fixing issues with complicated code is not as deterministic, as most people imagine. And any developer knows that they should definitely expect the unexpected! but few seriously wonder whats going on when we agree to estimate for them. So getting up-tight and blaming engineers for having delays is just as random as having a 90 day deadline.