The 5 Whys exercise helps project teams to identify the root cause issue(s) of a specific problem by repeating the question “Why?” until the underlying issue is identified. As the exercise is performed, the Belt will iterate and dive deeper into the issues as each answer forms the basis for the next question.
The 5 Whys tools is most effective when used to resolve simple or moderately difficult problems. For most simple problems, the 5 Whys exercise will follow a single lane of inquiry. However, for some problems, the 5 Whys exercise will branch off in to multiple lanes of inquiry.