5 Why Technique Of Problem Solving

Whenever an issue or a problem occurs, just ask “Why the problem occurred? 5 Whys works on the premise that “Every problem has a cause behind it but a superficial analysis will only depict symptoms.A persistent inquiry is required to find the real cause (the root cause) behind the issue so that lasting solutions can be taken and the problem doesn’t resurface.” For example – Let’s consider Jack is sick with nausea and goes to the doctor while expecting to get medication to treat nausea.However, nausea is just a ‘symptom’ of the problem and treating it does not mean we treat the real cause of nausea.

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Second root cause: There is an issue with the project management as ideally, a code freeze should happen at least 4 days before the UAT but here the team was working on fixing bugs at the last day.

Following are the key steps in the overall process of conducting a thorough 5 Whys analysis: When you are faced with a problem, the first logical step is to gather relevant team members.

Continuous implementation of practices like 5 Whys has made Toyota the world’s largest automaker.

One of the main reason why 5 Whys is so popular as a root cause analysis technique is its simplicity. There are no fancy steps no acronyms and there is no need for any memorization.

Root Cause: So you see, we needed 6 Whys to finally decipher that the weight of the load on the motor was more than its capacity and now we either need to replace the motor with a more powerful one or restrict the maximum load weight permitted on the conveyor belt at a time.

In this example, we see that there are 2 root cause rather than one: First root cause: The team members are not able to give correct estimations around their functionalities and there is a need for training on estimations techniques and their implementation.

In the example above, the failure of the feeding equipment could also be caused by incorrect weight readings from the salt feed bin to the process controller or failure of the process controller as well.

In the case either of these could be a reasonable failure suspect then it could also be listed as a separate cause in the 3rd Why section of the diagram as a separate branch to keep the iterative process going for this potential cause to identify if this is the root cause.

The 5 Whys problem solving technique uses a very simple iterative approach in analysing and attempting to find the root cause of a problem.

The 5 why technique originates from the Toyota Manufacturing system pioneered in Japan by the Toyota car company.