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The 5 Why's Method

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The 5 Why’s is a commonly used problem resolving method that is used to examine, determine, and solve any problem where the root cause of the problem is unknown (Tauseefakhan Ed. 2012). The 5 Why’s technique can also be used in the Analyze phase of the Six Sigma DMAIC (Define, measure, Analyze, Improve, and Control) methodology. It does not include any data segmentation, regression, hypothesis testing, or other accelerated statistical tools. In most cases, it can be completed without a data collection plan. When you repeatedly ask the question “Why”, you begin to peel away the layer of the symptom which can then guide you to the root of the problem, hence the name.

The 5 Why’s technique was originally created by Sakichi Toyoda which used it within Toyota Motor Corporation during the development of its manufacturing methodologies (Bulsuk, K. G. 2009). During this time, it was used as a critical element of problem solving training. There are many benefits of the 5 Why Method. One of the benefits would be that it helps label the root cause of a particular problem. It also helps figure out the correlation between different root causes of a problem. It is also a very manageable and effortless tool which gives results easily without statistical analysis. Since this tool is very simple, it is easily adaptable which can allow you to quickly apply it to almost any problem. It is most useful when problems include human factors or communication. It is also beneficial in everyday business life. At this point, it can be used with or without a Six Sigma project.

The concept of the 5 Why’s is uncomplicated. First, you need to make sure that you identify the problem (Tauseefakhan Ed. 2012). Identifying the problem helps determine the cause of the problem which can, in turn, help determine the solution. Next, one must ask themselves: “Why did this happen?” At this point, you

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