Image via WikipediaThe Blog and... the Book! : Good Math, Bad Math:
"The exact publication date isn't set yet, but my schedule plans for a complete draft of the book by summer. (And I used the scheduling rules proposed by one of my favorite managers. He said that when a programmer gives you an estimate of how long something should take, multiply it by two and increase the unit. So if they say it'll take a day, assume two weeks. If they say a week, assume two months. In my experience, it's actually a really good predictor.)"I wanted to mark down this cute scheduling trick, because I was going crazy trying to hunt it down.
Image by ASurroca via FlickrI think this is a very fine rule for all creative work, not just programming. It could very well be a fundamental rule of scheduling.