Inspiring… one of my favourite speaker – Start With Why – Simon Sinek
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Dilbert points to a visual aid and says, “The fishbone diagram helps identify the root cause of problems.” Dilbert continues as three Elbonians listen, “In your case, the root problem seems to be that you’re a nation of imbeciles . . .” An Elbonian says, “True, but YOU’RE the one who had to draw a dead fish to figure it out.” Another man says, “You’re in the club! Here’s your hat.”
5 Whys is an iterative interrogative technique used to explore the cause-and-effect relationships underlying a particular problem.The primary goal of the technique is to determine the root cause of a defect or problem by repeating the question “Why?” Each answer forms the basis of the next question. The “5” in the name derives from an anecdotal observation on the number of iterations needed to resolve the problem.
The technique was formally developed by Sakichi Toyoda and was used within the Toyota Motor Corporation during the evolution of its manufacturing methodologies. In other companies, it appears in other forms. Under Ricardo Semler, Semco practices “three whys” and broadens the practice to cover goal setting and decision making.
Not all problems have a single root cause. If one wishes to uncover multiple root causes, the method must be repeated asking a different sequence of questions each time.
The method provides no hard and fast rules about what lines of questions to explore, or how long to continue the search for additional root causes. Thus, even when the method is closely followed, the outcome still depends upon the knowledge and persistence of the people involved.
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