By drilling down farther and farther you can eventually arrive at the root causes of the effect you are analyzing. Typically a cause is itself and effect of another cause. For each cause, ask yourself why the cause occurs.For each cause identified, determine which category it falls within and draw a “minor bone” or a line from the “major bone” of the category. Brainstorm on the causes that result in the effect that you are analyzing.Surroundings, Suppliers, Systems, Skills (the 4 S’s).Place, Procedure, People, Policies (the 4 P’s, often used for the service industry).Methods, Machines, Materials, Manpower, Mother Nature, Measurements (the 6 M’s, often used for the manufacturing industry).The point is you can use whatever categories you team feels is best. Some of the common categories are listed here. The categories are used to provide a framework for the brainstorming and documenting of causes. These categories can be whatever you think would work best, but are typically standardized from company to company or team to team. These “major bones” are used to define the categories of causes that are to be identified.
Each should start at the spine of the fish and slant away from the head of the fish. D raw 4-6 vertical lines extending above and below the spine of the fish.Draw a horizontal line for the spine of the fish and list the main issue/effect at the head of the fish.Identifying areas that may be good candidates for data collection/measurement and controls.Identifying the most likely cause of a particular problem.Identifying the possible root causes of a particular problem.For this reason, it is sometimes referred to as a cause and effect diagram. Kaoru Ishikawa, a Japanese quality control statistician, the fishbone diagram is a systematic way of looking at an effect and identifying and capturing the causes that contribute and result in that particular effect. They may also be captured by recording the presentation.A fishbone diagram is a problem-analysis tool that derives it’s name from it’s shape which resembles the skeleton of a fish. Screenshots may be taken of the hand drawn diagrams while they are being displayed. Otherwise, particpants have a lot of fun drawing and displaying their fishbone diagrams by holding them up to the camera. This activity can be done online using collaboration boards some of which already have templates for the Fishbone Diagram that participants can utilize. Usual or Expected Outcomes: A list of the most likely and the most probable cause. What will it take to make this useful for the company?įollow-Up Required: problem solution generation process normally follows this. When an adequate amount of detail is in each of the major categories, look for items that show up in more than one category. Continue until no more useful information is coming out.ġ0. To generate more and deeper insights into the causes ask, "Why is this happening?"ĩ. For each of the categories create subcategories and put them on the smaller bones of the fish.Ĩ. Brainstorm issues that "cause" the issue.ĥ. Write the problem/issue to be worked on in the "head of the fish".Ĥ. Draw the fishbone diagram on a large white board of several flipcharts taped together.ģ. Therefore, it is often referred to as the fishbone diagram. The design of the diagram looks much like the skeleton of a fish. The fishbone diagram is tool to systematically look at an issue and the causes that contribute to those issues. It is some times called Ishikawa diagram. Kaoru Ishikawa, a Japanese quality control statistician, invented the fishbone diagram. Level of Difficulty to Facilitate (to be deleted during review): Facilitation skills requiredĭr. Type of Facilitator-Client Relationship: High trust needed
Pre-Work Required: Prepare blank fish diagram Setting: Fish Diagram on large white board or seveal flipchart taped to gether.
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