Cause and effect diagram; fishbone diagram. A problem-solving graphic. The problem is written on the right-hand side of a sheet. A fishbone of lines is drawn towards the problem statement and labelled with groups of potential causes e.g. 6M (Man Materials Machines Measurements Mother Nature) or 4P (People Processes Policies Procedures). Individual potential causes are then added to the fishbone for example by brainstorming.
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