Brainstorming is required in order to find the causes. The team should be mixed since if people with different expertise are involved, there’s more chance it will lead to extraordinary ideas. In particular, it should be done with those employees, who are directly involved in the problem-causing processes. It is recommended to complete the fishbone diagram as a team. Next to the category lines, the specific causes of the problem can be added. When using the 8M method, three additional factors are used: ![]() The 5M method also uses the additional factor of: The 4M method uses the following main influencing factors: They refer to the main influencing factors of processes, which often lead to problems. When specifying the potential causes of the problem, you can use several methods: the 4M method, and its extensions the 5M and 8M methods, are frequently used. Several other lines branch off from this main line: the possible causes of the problem. You then draw a line or an arrow to the left i.e. Be as accurate as possible when describing the problem and write it on the right hand side of the flip chart or blackboard. It is written down before any other observations are made. ![]() ![]() The problem that needs to be addressed is on the right side of the diagram. Every problem, requiring a sustainable solution, is graphically illustrated with its respective causes in the diagram. It is therefore also called the cause-effect diagram. The fishbone diagram, invented by Ishikawa Kaoru, a Japanese chemist, (hence why it is also referred to as the Ishikawa diagram) aims to help companies find solutions to problems and their causes in a structured way.
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