![]() ![]() – Performance The 4 S’s (used in service industries):Ĭlick here to download our FREE Ishikawa Diagram (Cause and Effect) Template Excel Spreadsheet Example Combine this free template with other tools:Ĭlick here and learn more about Fishbone Ishikawa Diagram (asq. – Maintenance The 8 Ps (used in product marketing): – Mission / mother nature (purpose, environment) – Measurement / medium (inspection, environment) These have been expanded by some to include an additional three, and are referred to as the 8 Ms: ![]() – Man / mind power (physical or knowledge work, includes: kaizens, suggestions) – Material (includes raw material, consumables, and information) Typical categories include The 5 Ms (used in manufacturing): Each potential cause is traced back to find the root cause, often using the 5 Whys technique. To help structure the approach, the categories are often selected from one of the common models shown below, but may emerge as something unique to the application in a specific case. This methodology can be used on any type of problem, and can be tailored by the user to fit the circumstances. On a root cause analysis (RCA), after identifying potential root cause(s), further testing will be necessary to confirm the true root cause(s). The Fishbone chart is an initial step in the screening process. This diagram is used in process improvement methods to identify all of the contributing root causes likely to be causing a problem. The following tree diagram shows the difference between categorization (grouping of causes) and causality (the tree).Fishbone Diagram (also known as Ishikawa Diagram) can be used to answer the following questions that commonly arise in problem solving: What are the potential root causes of a problem? What category of process inputs represents the greatest source of variability in the process output? Just as the main categories (Equipment, People, etc.) are highlighted by placing a circle or box around them, if you include sub-categories in your cause-and-effect diagram, circle the sub-category so you can distinguish between categorization vs. Using the fish bone diagram loosely may result in a combination of the two approaches as the group oscillates between categorizing different causes and asking "Why?" or "Why else?".Īlthough I've never seen any reference for this technique, I use the following rule to distinguish between categorization vs.
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