Identify the major factors and draw four or more branches off the large arrow to represent main categories of potential causes. Where appropriate, identify who is involved, what the problem is, and when and where it occurs. Write it in a box and draw an arrow pointing towards it. Focuses the team on the root cause of the problem – not its symptomsįirstly, identify the problem.Creates a snapshot of the collective knowledge and consensus of a team around a problem.If you know the cause of the delay, you are then better placed to implement the solution.Įnables a team to focus on the content of the problem rather than its history or the differing interests of team members The tool quickly helps you to fully understand an issue and to identify all the possible causes – not just the obvious. The cause and effect diagram is sometimes called a fishbone diagram (because the diagram looks like the skeleton of a fish) or an Ishikawa diagram (after its inventor, Professor Kaoru Ishikawa of Tokyo University). The people involved benefit from shared contributions, leading to a common understanding of the problem. It will help you understand the problem more clearly.īy going through the process of building the diagram with colleagues, everybody gains insights into the problem, alongside possible solutions. The tool can help you identify major causes and indicate the most fruitful areas for further investigation. The ‘effect’ is the problem you are working on, for example ‘waiting time’. It is only by identifying the main causes that you can permanently remove the problem, or reduce the delay.Ī cause and effect diagram is a tool that helps you do this.
Cause and Effect Diagram (Fish Bone) What is it and how can it help me?Ĭause and effect analysis helps you to think through the causes of a problem thoroughly, including its possible root causes.
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