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The 5 Whys: just keep asking “Why?” until

posted by Jason Kottke   Jan 28, 2008

The 5 Whys: just keep asking “Why?” until you get to the true cause of a particular situation or problem.

The technique was originally developed by Sakichi Toyoda and was later used within Toyota Motor Corporation during the evolution of their manufacturing methodologies. It is a critical component of problem solving training delivered as part of the induction into the Toyota Production System. The architect of the Toyota Production System, Taiichi Ohno, described the 5 whys method as “… the basis of Toyota’s scientific approach … by repeating why five times, the nature of the problem as well as its solution becomes clear.”

(via migurski)