![]() Hint: Use check sheets to determine the frequencies of various causes, and scatter plots to test the strength of cause-effect correlation. ![]() Test for root causes by looking for causes that appear repeatedly within categories or across major categories. A good rule of thumb: When a cause is controlled by more than one level of management, remove it from the group. While you could likely brainstorm all day, however, it is important to know when to stop to avoid frustration. Treat each contributing factor as its own "mini-rib," and keep asking why each factor is occurring.Ĭontinue to push deeper for a clear understanding. Your team might lack expertise, for example, because of a lack of training, but also because you didn't hire the right people for the job. You may end up with multiple branches off of each successively smaller rib. (More Information: Wikipedia: Five Whys.) 5. Your team may need more or less than five whys. Sometimes this asking process is called the "Five Whys," as five is often a manageable number to reach a suitable root cause.
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