I'd say that's just a function of how much learning you have to do while doing. If you have all the information required to do something, the the time needed pr

I'd say that's just a function of how much learning you have to do while doing. If you have all the information required to do something, the the time needed probably approaches a normal distribution. But any unknown unknowns that you encounter are vastly more likely to delay than expedite the project, making the right-side tail both fatter and longer.