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Guidance also covers reframing problems as “why” questions, revisiting sparse areas, and prioritizing validated causes for stronger solutions.",{"@graph":14,"@context":73},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/template/","Template",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/template/presentations/","Presentations",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/template/fishbone-ishikawa-diagram-cause-and-effect-root-cause-analysis/242789/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/fishbone-ishikawa-diagram-cause-and-effect-root-cause-analysis/242789.png","ImageObject",442,249,{"name":42,"@type":43},"Elsa","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-18","2026-09-12",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",11,{"@type":57,"mainEntity":58},"FAQPage",[59,65,69],{"name":60,"@type":61,"acceptedAnswer":62},"What is a Fishbone (Ishikawa) diagram used for?","Question",{"text":63,"@type":64},"It identifies many possible causes for an effect or problem and helps structure brainstorming into useful categories.","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"What are the standard cause categories in a Fishbone diagram?",{"text":68,"@type":64},"Common categories include Methods, Machines, People, Materials, Measurement, and Environment, which can be modified to fit the project.",{"name":70,"@type":61,"acceptedAnswer":71},"How do you build deeper levels of causes in the Fishbone procedure?",{"text":72,"@type":64},"For each identified cause, repeatedly ask “why does this happen?” and add sub-causes as additional branches, continuing until the team runs out of ideas.","https://schema.org",{"og:url":32,"og:type":75,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":77,"canonical":32},"index,follow",{"doc_id":79,"site_id":7},242789,1791736339,{"code":4,"msg":82,"data":83},"success",[84,87,92,97,102,107,112,117,122],{"id":55,"doc_module":22,"doc_module_name":25,"category_name":29,"show_sort_weight":85,"slug":86},90,"presentations",{"id":88,"doc_module":22,"doc_module_name":25,"category_name":89,"show_sort_weight":90,"slug":91},12,"Resumes",80,"resumes",{"id":93,"doc_module":22,"doc_module_name":25,"category_name":94,"show_sort_weight":95,"slug":96},14,"Invoices",70,"invoices",{"id":98,"doc_module":22,"doc_module_name":25,"category_name":99,"show_sort_weight":100,"slug":101},15,"Posters",60,"posters",{"id":103,"doc_module":22,"doc_module_name":25,"category_name":104,"show_sort_weight":105,"slug":106},16,"Social Media",50,"social-media",{"id":108,"doc_module":22,"doc_module_name":25,"category_name":109,"show_sort_weight":110,"slug":111},17,"Forms",40,"forms",{"id":113,"doc_module":22,"doc_module_name":25,"category_name":114,"show_sort_weight":115,"slug":116},18,"Letters",30,"letters",{"id":118,"doc_module":22,"doc_module_name":25,"category_name":119,"show_sort_weight":120,"slug":121},21,"Paper Templates",5,"papers-templates",{"id":123,"doc_module":22,"doc_module_name":25,"category_name":124,"show_sort_weight":4,"slug":125},158,"General","general-158",{"code":4,"msg":82,"data":127},{"doc_id":79,"user_id":128,"nickname":42,"user_avatar":129,"doc_module":22,"category_id":55,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":130,"file_id":131,"file_url":132,"file_type":133,"file_size":134,"view_count":55,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":33,"language":135,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":136,"faqs":137,"seo_title":138,"seo_description":12,"update_tm":139,"read_time":26},137455077381,"https://ap-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","Fishbone (Ishikawa) Diagram  \nLooking for more quality tools?  \nTry Plan-Do-Study-Act (PDSA) Plus QTools™ Training:  \n• Fishbone Diagram  \n• 5 Whys  \n• QToolsTM Bundle  \n• Plan-Do-Study-Act plus QToolsTM  \nAlso Called: Cause–and–Effect Diagram, Ishikawa Diagram  \nVariations: cause enumeration diagram, process fishbone, time–delay fishbone, CEDAC (cause–and–effect diagram with the addition of cards), desired–result fishbone, reverse fishbone diagram  \nThe fishbone diagram identifies many possible causes for an effect or problem. It can be used to structure a brainstorming session. It immediately sorts ideas into useful categories.  \nWhen to Use a Fishbone Diagram  \n• When identifying possible causes for a problem.  \n• Especially when a team’s thinking tends to fall into ruts.  \nFishbone Diagram Procedure  \nMaterials needed: flipchart or whiteboard, marking pens.  \n1. Agree on a problem statement (effect) . Write it at the center right of the flipchart or whiteboard. Draw a box around it and draw a horizontal arrow running to it.  \n2. Brainstorm the major categories of causes of the problem. If this is difficult use generic headings:  \n• Methods  \n• Machines (equipment)  \n• People (manpower)  \n• Materials  \n• Measurement  \n• Environment  \n3. Write the categories of causes as branches from the main arrow.  \n4. Brainstorm all the possible causes of the problem. Ask: “Why does this happen?” As each idea is given, the facilitator writes it as a branch from the appropriate category. Causes can be written in several places if they relate to several categories.  \n5. Again ask “why does this happen?” about each cause. Write sub–causes branching off the causes. Continue to ask “Why?” and generate deeper levels of causes. Layers of branches indicate causal relationships.  \n6. When the group runs out of ideas, focus attention to places on the chart where ideas are few.  \nFishbone Diagram Example  \nThis fishbone diagram was drawn by a manufacturing team to try to understand the source of periodic iron contamination. The team used the six generic headings to prompt ideas. Layers of branches show thorough thinking about the causes of the problem.  \nFishbone Diagram Example  \nFor example, under the heading “Machines,” the idea “materials of construction” shows four kinds of equipment and then several specific machine numbers.  \nNote that some ideas appear in two different places. “Calibration” shows up under“Methods” as a factor in the analytical procedure, and also under “Measurement” as a cause of lab error. “Iron tools” can be considered a “Methods” problem when taking samples or a “Manpower” problem with maintenance personnel.  \nExcerpted from Nancy R. Tague’s The Quality Toolbox, Second Edition, ASQ Quality Press, 2005, pages 247–249.  \nCreate a Fishbone Diagram  \nAnalyze process dispersion with this simple, visual tool. The resulting diagram illustrates the main causes and subcauses leading to an effect (symptom) . Start using the Fishbone tool(Excel, 39 KB) .  \nThe Cause and Effect (a.k.a. Fishbone) Diagram  \nKerri Simon 18  \nWhen utilizing a team approach to problem solving, there are often many opinions as to the problem’s root cause. One way to capture these different ideas and stimulate the team’s brainstorming on root causes is the cause and effect diagram, commonly called a fishbone. The fishbone will help to visually display the many potential causes for a specific problem or effect. It is particularly useful in a group setting and for situations in which little quantitative data is available for analysis.  \nThe fishbone has an ancillary benefit as well. Because people by nature often like to get right to determining what todo about a problem, this can help bring out a more thorough exploration of the issues behind the problem – which will lead to a more robust solution.  \nTo construct a fishbone, start with stating the problem in the form of a question, such as “Why is the help desk’s abandon rate so high?” Framing it as a “why”","cbCaijRkd2tloZrf","https://ap.wps.com/l/cbCaijRkd2tloZrf","pdf",301546,"English","# Fishbone (Ishikawa) Diagram\n## When to Use a Fishbone Diagram\n## Fishbone Diagram Procedure\n## Fishbone Diagram Example\n## Create a Fishbone Diagram","[{\"question\":\"What is a Fishbone (Ishikawa) diagram used for?\",\"answer\":\"It identifies many possible causes for an effect or problem and helps structure brainstorming into useful categories.\"},{\"question\":\"What are the standard cause categories in a Fishbone diagram?\",\"answer\":\"Common categories include Methods, Machines, People, Materials, Measurement, and Environment, which can be modified to fit the project.\"},{\"question\":\"How do you build deeper levels of causes in the Fishbone procedure?\",\"answer\":\"For each identified cause, repeatedly ask “why does this happen?” and add sub-causes as additional branches, continuing until the team runs out of ideas.\"}]","Fishbone (Ishikawa) Diagram - Cause-and-Effect Root Cause Analysis | PDF",1789194881]