Here is a fishbone diagram for Quality management. It is a structured way to identify and organize potential causes of a problem or effect. Here is a sample. As the template shows, the diagram looks like a fishbone with the problem or effect at the head and the potential causes branching out like the bones of a fish. Each cause is listed on a separate branch, and sub-causes can be further branched out from the main causes. This helps to identify and prioritize the root causes of a problem, making it easier to develop solutions.
