Akin's Laws of Spacecraft Design (2003)
> 29. (von Tiesenhausen's Law of Program Management) To get an accurate estimate of final program requirements, multiply the initial time estimates by pi, and slide the decimal point on the cost estimates one place to the right.I was going to complain that Cheops' Law ("it always takes longer and costs more" is my version) was missing, but that's a useful elaboration providing a new target.