I have a coworker whose somewhat cheeky method I often cite. Think about the task, guess how long it'll take you, double it, shift units. I usually get a wry

I have a coworker whose somewhat cheeky method I often cite. Think about the task, guess how long it'll take you, double it, shift units. I usually get a wry look from our project managers when I mention it. e.g. 1 hr = 2 days, 2 days = 4 weeks, 4 weeks = 8 months, 8 months = 16 years