There are known knowns; there are things we know we know. We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknowns — the ones we don’t know we don’t know.

The infamous moment when Donald Rumsfeld tried to explain the missing WMDs with the “unknown”, while delivering the Whitehouse defense news briefing on 12th February 2002. Rumsfeld was using the Johari Window — a technique developed by cognitive psychologists in the 50s to help people better understand their relationship with themselves and others.

The Trouble with Software and Estimates

Ask the question “Why can’t developers estimate time?” and you get a lot of answers. In fact it’s a topic, with a history going back to the ’60s, that’s bred a whole industry of methodologies, solutions and consultants.

harry fuecks

things about leading software engineering, product management and stuff

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