Kids do it. Always. Constantly. Without mercy. They ask why. Follow-up with a next why. And a next why. And a next why. Consultants can learn a lot from kids.
To find the root cause to any problem or defect, empirical observation has shown that 5 times asking why would lead to the source. Referring to wikipedia, the “5 why’s” is a technique originally developed by Toyota Motor Corporation (http://en.wikipedia.org/wiki/5_Whys).
So remember rule #60 next time you’re in a workshop, meeting or discussion: Ask 5 times why. And you’ll be at real root cause leading you to a solutions or improvement idea.