As a programmer there have been many times when I have found a bottle neck in an app I’ve written that comes down to waiting on some kind of input. Usually you end up needing the result of this input for the next step in your code and thus the wait is necessary.

When faced with a problem that needs to be solved with precision, no one would even consider not measuring carefully two, maybe even three times. Consider a carpenter building a bookcase the full length and height of a wall – he has absolutely no room to spare, he must be precise in the angles he cuts.