Source: xkcd.com New tasks with unknowns over-run estimates no matter how much buffer you build-in. Hofstadter's Law: "It always takes longer than you expect, even when you take into account Hofstadter's Law." This law really highlights the risk of running any task outside the control of a clear process. To be clear, in a well-designed, trained, and controlled process you will find tasks are repeatable and predictable. When you design process, you design every step to minimiz