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The major categories of possible causes in a fishbone diagram, also known as an Ishikawa diagram, are usually materials, measurements, method, machine, people, and environment. These broad categories encompass most contributing factors to a problem, allowing for a comprehensive analysis.
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Another tool to identify cause and effect is a fishbone diagram, also known as an Ishikawa diagram. In this diagram, the team first agrees on what the problem statement is. The spine of the fish connects to all the major categories of possible causes. These categories are usually "materials", "measurements", "method", "machine", "people", and "environment." Since these are broad buckets, most contributing factors will fit under one of these six bones, so list the possible factors in each possible cause category. In order to see beyond the obvious for deeper analysis, use the 5 whys framework to ask the "why" behind any of these potential problems until the root of the issue is uncovered. (Slide 13)
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