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Blog Beginner Guides 15+ Fishbone Diagram Examples for Brainstorming Problem Causes

15+ Fishbone Diagram Examples for Brainstorming Problem Causes

Written by: Danesh Ramuthi Oct 13, 2023

The fishbone diagram, often referred to as the Ishikawa diagram or cause and effect diagram, is a powerful visualization tool that elucidates the intricate web of contributing factors behind a specific problem or issue. Characterized by its unique bone structure, it places the problem statement at the fish’s head, branching out to the various causes categorized into major segments.

The primary purpose of a fishbone diagram is to break down complex problems into understandable components, enabling team members to efficiently brainstorm and analyze causal relationships, making it indispensable in areas like quality management and root cause analysis.

Whether you’re aiming to delve deep into the causes of climate change or dissect the factors behind a the fishbone diagram provides a clear visual representation, highlighting the cause and effect relationship and underscoring the value of systematic problem solving.

For those eager to harness the potential of this great tool, Venngage offers a robust diagram maker . With customizable fishbone diagram templates , it empowers users to craft their diagrams effortlessly. These templates are meticulously designed to help you place ideas in the appropriate category, ensuring a comprehensive and organized cause and effect analysis.

Click to jump ahead:

Root cause fishbone diagram example

Cause and effect fishbone diagram example, ishikawa fishbone diagram example, medical fishbone diagram example, climate fishbone diagram example, project management fishbone diagram example, simple fishbone diagram example, how to use a fishbone diagram.

A root cause fishbone diagram, at its core, is a tool specifically tailored to identify, analyze and represent the underlying causes or root causes of a problem. Imagine a scenario where a manufacturing process has a recurring defect. 

In such a scenario, the problem statement or defect would be placed at the fish’s head. As one begins the fishbone analysis, the spine of the fish represents the main flow of the process, with smaller bones branching out. Each of these bones corresponds to a contributing factor or potential cause of the defect.

Utilizing the fishbone diagram for root cause analysis involves gathering team members for a brainstorming session. Here, the group would identify various major categories like “Machinery”, “Manpower”, “Materials”, “Methods”, etc. 

Under each of these categories, multiple factors are explored. For instance, under “Machinery”, potential causes could include outdated equipment, calibration errors or frequent breakdowns. The aim is to determine the root cause, or in some cases, multiple root causes, responsible for the defect. 

The visual representation afforded by the diagram aids in systematically breaking down the problem, ensuring no stone is left unturned.

One of the advantages of using a root cause fishbone diagram is its ability to pinpoint areas that might otherwise be overlooked. It offers a structured approach, helping teams avoid short-term fixes and instead address the deeper, underlying issues. However, it’s crucial to be aware of its disadvantages too. 

The success of the diagram heavily relies on the expertise and insights of the team members. If not all possible causes are considered, the analysis may be incomplete, leading to erroneous conclusions.

The cause and effect fishbone diagram is primarily used to map out the various causes contributing to a specific effect or outcome. For instance, consider a problem statement like “Decreased Sales in Quarter 3”. 

Placed at the head of the fish, this statement becomes the focal point of the analysis. The spine extends outwards, branching into multiple categories that could be influencing this decline.

Starting with a brainstorming session, team members can identify major categories such as “Marketing”, “Product Quality”, “External Factors”, and “Customer Service”. Under “Marketing”, for example, potential causes could be insufficient advertising, poor social media engagement, or ineffective promotional campaigns. 

The aim is to capture all the possible causes contributing to the decline in sales. Through the fishbone diagram’s structured format, teams can effectively map out the causal relationships, understanding how various factors interplay and lead to the overarching problem.

Using the cause and effect fishbone diagram offers a comprehensive overview, helping businesses or teams strategize effectively. They can prioritize areas that need urgent attention and develop strategies for improvement. 

However, like all tools, it has its disadvantages. It requires thoroughness and can become convoluted if too many minor issues are included. Thus, it’s essential to keep the diagram focused on significant, impactful causes to maintain its efficacy as a problem-solving tool.

The Ishikawa fishbone diagram or just fishbone diagram, named after its creator Kaoru Ishikawa, is a powerful visualization tool designed to map out causal relationships concerning a particular problem or issue. Its unique design, reminiscent of a fish’s skeletal structure, places the primary problem or effect at the fish’s head.

From this focal point, the “spine” of the fish extends, leading to branching “bones.” Each branch represents a category or a group of potential contributing factors that lead to the main problem. Often used in root cause analysis and quality management, the Ishikawa diagram breaks down complex issues by categorizing them into major areas such as “People”, “Processes”, “Environment” and more.

This structure allows for an organized exploration of potential causes, ensuring that various perspectives and elements related to the problem are considered.

By facilitating systematic identification and categorization of causes, the Ishikawa fishbone diagram becomes an essential tool in problem-solving and decision-making processes.

In the medical realm, the fishbone diagram finds a specialized application, offering clinicians a structured format to diagnose and understand patient conditions.

Given the critical nature of healthcare, pinpointing the root causes of medical symptoms or conditions becomes paramount. A medical fishbone diagram aids in this by visualizing potential causes related to a specific medical problem or symptom. Categories in a medical context might include “Laboratory Results”, “Patient History”, “Physical Examination Findings” and “Environmental Factors”.

Under each category, various factors or sub-causes can be listed. For instance, “Laboratory Results” could delve into specifics like electrolyte imbalances or abnormal blood cell counts.

The diagram’s visual representation ensures that healthcare professionals can comprehensively analyze patient conditions, considering multiple facets before determining a diagnosis or treatment plan. This systematic approach fosters enhanced patient care and promotes more accurate diagnostic processes.

Designed for meticulous cause and effect analysis, this fishbone diagram delves into the complex problems associated with climate change. Its visual representation, characteristic of the fish’s skeletal structure, places the overarching problem statement — for instance, “Global Warming” — at the fish’s head. From here, multiple categories branch out, representing major aspects such as “Anthropogenic Activities”, “Natural Causes” and “Economic Factors”. 

Each of these major categories further branches out to depict the specific factors contributing to the primary problem. 

The strength of the climate fishbone diagram lies in its ability to present a comprehensive overview, ensuring that all potential causes, whether they relate to deforestation, industrial emissions, or natural volcanic activities, are captured and analyzed. 

It serves as a visualization tool that aids researchers and decision-makers in crafting informed and effective strategies to combat climate-induced challenges.

In project management, where precision and systematic problem solving are paramount, the fishbone diagram finds significant utility. Project delays, cost overruns and unmet objectives often have multifaceted root causes. 

The project management fishbone diagram, an adaptation of the Ishikawa diagram, serves to identify, categorize and analyze these causes. 

Each category delineates into specific contributing factors, ensuring a thorough exploration of all potential issues. The visual format of the diagram aids team members during brainstorming sessions, facilitating the identification of challenges within the project lifecycle. 

By offering a clear visual representation of the cause and effect relationships inherent in project challenges, the project management fishbone diagram stands as an invaluable tool, helping teams to preemptively address issues, optimize processes and enhance overall project execution.

Related: How to Write a Comprehensive Project Management Plan [+ Examples]

For problems that may not be as intricate but still require structured analysis, a simple fishbone diagram becomes the tool of choice. Stripped of excessive categories and branches, the simple fishbone diagram focuses on presenting the main causes of a problem in a straightforward manner. 

Despite its simplicity, the core structure remains consistent: the primary issue or problem statement occupies the fish’s head, while a few major categories branch out from the central spine. This diagram’s strength lies in its accessibility; without delving into overly detailed branches, it offers a clear, concise visualization of the root causes and contributing factors. 

It’s particularly beneficial for quick brainstorming sessions or when introducing the concept of cause and effect analysis to those unfamiliar with the fishbone methodology. 

The simple fishbone diagram, while not exhaustive, provides a foundational framework, promoting structured thought and problem-solving in various contexts.

A fishbone diagram , also known as an Ishikawa or cause and effect diagram, provides a visual representation of potential causes leading to a particular problem or effect. 

It is a structured brainstorming tool that helps teams identify, explore and visually display the many potential causes related to a specific problem.

• Begin your fishbone diagram with the problem statement or the main effect you’re trying to understand. This is written on the right side and represents the fish’s head.
• Draw a horizontal line extending from the problem statement towards the left. This is the fish’s spine and serves as a foundation for the potential causes.
• Identify the major categories of causes. Common categories include “People”, “Processes”, “Equipment”, “Materials” and others, depending on the context. These are the primary bones branching off the central spine.
• Draw diagonal lines or “fishbones” branching off the spine for each major category.
• Under each major category, brainstorm and list down the potential contributing factors or sub-causes. These represent the smaller bones branching out from the primary bones.
• Connect these sub-causes to the respective major category lines using smaller diagonal lines.
• For causes that may have sub-components or more detailed breakdowns, further branch out from the main cause.
• Make sure to clearly label each cause and sub-cause for clarity.
• After the brainstorming session, analyze the diagram to determine the most likely root causes of the problem.
• Once complete, your fishbone diagram should offer a comprehensive visual overview of all the potential causes leading to the main problem. This structure enables teams to better understand the problem, prioritize potential causes and develop effective solutions or interventions.

Related: 10+ Types of Diagrams and How to Choose the Right One

We explored over 15 examples of fishbone diagrams to help you effectively brainstorm the causes of problems. 

This tool, with its visually intuitive structure, serves as a game-changer in analyzing root causes across various fields, from business challenges to technological snags. 

This article doesn’t just present examples but also educates readers on how to harness the power of the fishbone diagram to its fullest. 

For anyone inspired to create their own or seeking specialized templates, Venngage stands out as a go-to resource.

Explore Venngage’s diagram maker and discover an array of pre-designed fishbone diagram templates to kickstart your brainstorming sessions.

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• What Is a Fishbone Diagram? | Templates & Examples

What Is a Fishbone Diagram? | Templates & Examples

Published on January 2, 2023 by Tegan George . Revised on January 29, 2024.

A fishbone diagram is a problem-solving approach that uses a fish-shaped diagram to model possible root causes of problems and troubleshoot possible solutions. It is also called an Ishikawa diagram, after its creator, Kaoru Ishikawa, as well as a herringbone diagram or cause-and-effect diagram.

Fishbone diagrams are often used in root cause analysis , to troubleshoot issues in quality management or product development. They are also used in the fields of nursing and healthcare, or as a brainstorming and mind-mapping technique many students find helpful.

Table of contents

How to make a fishbone diagram, fishbone diagram templates, fishbone diagram examples, advantages and disadvantages of fishbone diagrams, other interesting articles, frequently asked questions about fishbone diagrams.

A fishbone diagram is easy to draw, or you can use a template for an online version.

• Your fishbone diagram starts out with an issue or problem. This is the “head” of the fish, summarized in a few words or a small phrase.
• Next, draw a long arrow, which serves as the fish’s backbone.
• From here, you’ll draw the first “bones” directly from the backbone, in the shape of small diagonal lines going right-to-left. These represent the most likely or overarching causes of your problem.
• Branching off from each of these first bones, create smaller bones containing contributing information and necessary detail.
• When finished, your fishbone diagram should give you a wide-view idea of what the root causes of the issue you’re facing could be, allowing you to rank them or choose which could be most plausible.

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There are no built-in fishbone diagram templates in Microsoft programs, but we’ve made a few free ones for you to use that you can download below. Alternatively, you can make one yourself using the following steps:

• In a fresh document, go to Insert > Shapes
• Draw a long arrow from left to right, and add a text box on the right-hand side. These serve as the backbone and the head of the fish.
• Next, add lines jutting diagonally from the backbone. These serve as the ribs, or the contributing factors to the main problem.
• Next, add horizontal lines jutting from each central line. These serve as the potential causes of the problem.

Lastly, add text boxes to label each function.

You can try your hand at filling one in yourself using the various blank fishbone diagram templates below, in the following formats:

Fishbone diagram template Excel

Download our free Excel template below!

Fishbone diagram template Word

Download our free Word template below!

Fishbone diagram template PowerPoint

Download our free PowerPoint template below!

Fishbone diagrams are used in a variety of settings, both academic and professional. They are particularly popular in healthcare settings, particularly nursing, or in group brainstorm study sessions. In the business world, they are an often-used tool for quality assurance or human resources professionals.

Fishbone diagram example #1: Climate change

Let’s start with an everyday example: what are the main causes of climate change?

Fishbone diagram example #2: Healthcare and nursing

Fishbone diagrams are often used in nursing and healthcare to diagnose patients with unclear symptoms, or to streamline processes or fix ongoing problems. For example: why have surveys shown a decrease in patient satisfaction?

Fishbone diagram example #3: Quality assurance

QA professionals also use fishbone diagrams to troubleshoot usability issues, such as: why is the website down?

Fishbone diagram example #4: HR

Lastly, an HR example: why are employees leaving the company?

Fishbone diagrams come with advantages and disadvantages.

• Great tool for brainstorming and mind-mapping, either individually or in a group project.
• Can help identify causal relationships and clarify relationships between variables .
• Constant iteration of “why” questions really drills down to root problems and elegantly simplifies even complex issues.

Disadvantages

• Can lead to incorrect or inconsistent conclusions if the wrong assumptions are made about root causes or the wrong variables are prioritized.
• Fishbone diagrams are best suited to short phrases or simple ideas—they can get cluttered and confusing easily.
• Best used in the exploratory research phase, since they cannot provide true answers, only suggestions.

If you want to know more about the research process , methodology , research bias , or statistics , make sure to check out some of our other articles with explanations and examples.

Methodology

• Sampling methods
• Simple random sampling
• Stratified sampling
• Cluster sampling
• Likert scales
• Reproducibility

 Statistics

• Null hypothesis
• Statistical power
• Probability distribution
• Effect size
• Poisson distribution

Research bias

• Optimism bias
• Cognitive bias
• Implicit bias
• Hawthorne effect
• Anchoring bias
• Explicit bias

Fishbone diagrams have a few different names that are used interchangeably, including herringbone diagram, cause-and-effect diagram, and Ishikawa diagram.

These are all ways to refer to the same thing– a problem-solving approach that uses a fish-shaped diagram to model possible root causes of problems and troubleshoot solutions.

Fishbone diagrams (also called herringbone diagrams, cause-and-effect diagrams, and Ishikawa diagrams) are most popular in fields of quality management. They are also commonly used in nursing and healthcare, or as a brainstorming technique for students.

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Guide: Fishbone Diagram

Author: Daniel Croft

Daniel Croft is an experienced continuous improvement manager with a Lean Six Sigma Black Belt and a Bachelor's degree in Business Management. With more than ten years of experience applying his skills across various industries, Daniel specializes in optimizing processes and improving efficiency. His approach combines practical experience with a deep understanding of business fundamentals to drive meaningful change.

The Fishbone Diagram, also known by various other names such as Ishikawa Diagram, Cause and Effect Diagram or 6Ms, is a visual tool used in problem-solving and root cause analysis . Originating from the quality management sector, it is used as a systematic approach to identify, explore, and display possible causes of a specific problem.

What is a Fishbone Diagram?

The Fishbone Diagram is a graphical tool used for identifying and organizing possible causes of a specific problem or outcome. The diagram resembles the skeletal structure of a fish, hence its name. At the “head” of the fish is the problem you’re trying to solve, and the “bones” branching off the spine are the multiple potential causes contributing to that problem.

The benefit of a Fishbone Diagram lies in its simplicity. It gives you a structured way to brainstorm and categorize the various factors affecting a specific issue. The diagram can get as detailed as you need it to be, allowing for sub-causes to branch off the main causes, offering even deeper insights.

The Components of a Fishbone Diagram

Head : The fish’s head represents the problem or effect you’re analyzing.

Spine : The long, horizontal line connecting to the head serves as the timeline or sequence of the problem.

Bones : These are the categories of potential causes. They branch off the spine, leading towards the head.

Sub-Bones : These are the more specific factors or sub-causes that stem from the main categories.

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Why Use a Fishbone Diagram?

The Fishbone Diagram is a flexible tool that can be used for a range of applications. Here’s why it’s so useful:

1. Easy Visualization:

One of the primary advantages of using a Fishbone Diagram is its ability to simplify complex problems. With all potential causes visually represented in one place, it becomes easier to analyze and discuss the issues.

2. Team Collaboration:

The Fishbone Diagram is excellent for brainstorming sessions. It encourages team members to think critically and contributes to a shared understanding of the problem. It’s collaborative by design, allowing for the collective intelligence of the group to shine.

3. Root Cause Analysis:

Identifying symptoms of a problem is one thing; uncovering the root cause is another. The Fishbone Diagram excels at this by forcing you to dig deep into various contributing factors. By isolating these causes, you’re better positioned to find a lasting solution.

By using a Fishbone Diagram, you’re not just addressing a problem with a short-term fix; you’re conducting a thorough investigation to eliminate issues from the root up.

How to Create a Fishbone Diagram: A Detailed Guide

Creating a Fishbone Diagram might seem like a daunting task, but it’s actually a straightforward process. Here, we’ll break down each step in detail to ensure you can construct a Fishbone Diagram that serves its purpose effectively.

Materials You’ll Need:

• A whiteboard or large sheet of paper
• Markers or pens
• Sticky notes (optional)
• A team of people for brainstorming

Step 1: Identify the Problem

The first and most crucial step is to clearly identify the problem you’re trying to solve. This statement should be specific and concise. Write this problem statement at the far right side of your whiteboard or paper, as it will serve as the “head” of your fishbone diagram.

• Use data to define the problem whenever possible.
• Make sure the problem is mutually understood and agreed upon by all team members.

Step 2: Determine the Main Categories

Now, draw a horizontal line from the problem statement towards the left side of the board. This is the “spine” of your fish. Next, you’ll identify the major categories of causes that could be contributing to the problem. These categories will serve as the main “bones” branching off from the spine.

Common categories often include:

• Measurement
• Environment
• The categories can be industry-specific or general, depending on the problem you’re analyzing.
• Aim for 4-6 main categories for better manageability.

Step 3: Brainstorm Causes

Once you’ve determined the main categories, it’s time to brainstorm potential causes for each category. These causes will be the smaller “bones” that branch off from the main bones. If you’re working with a team, this is an excellent time for a brainstorming session.

• Use sticky notes to write down ideas so you can easily move them around.
• Encourage every team member to contribute; sometimes the most unexpected insights come from diverse perspectives.

The output of the root cause analysis at this point may look something like the below example. With the lack of preventative maintenance being explored with the 5Whys analysis.

Step 4: Dig Deeper with Sub-Causes

Sometimes, the primary causes can be broken down into smaller, more specific sub-causes. This is where the “ 5 Whys ” technique can be beneficial. For each primary cause, ask “Why?” up to five times to dig deeper into the root of the issue.

• Not all primary causes will need sub-causes; use your discretion.
• Keep the diagram organized to ensure readability.

Step 5: Analyze and Take Action

After all the causes and sub-causes have been identified, it’s time to analyze the Fishbone Diagram as a team. Highlight or circle the causes that seem most likely to be contributing to the problem. These are the areas that will need immediate attention and action.

• Use data or evidence to support your conclusions.
• Create an action plan assigning responsibility for each highlighted cause.

And there you have it! You’ve successfully created a Fishbone Diagram that will help you get to the root of your problem.

Examples and Case Studies: Understanding Fishbone Diagrams in Action

Case study: manufacturing unit with quality issues.

Imagine you run a manufacturing unit, and you’ve been receiving complaints about the quality of your products. You decide to use a Fishbone Diagram to get to the root of the issue.

Step 1: Identify the Problem Problem Statement: “High number of defective products in the last quarter.”

Step 2: main categories.

• People : Untrained staff, high employee turnover
• Process : Inconsistent quality checks, outdated SOPs (Standard Operating Procedures)
• Equipment : Aged machinery, lack of maintenance
• Environment : Poor lighting, extreme temperature fluctuations

Step 4: Dig Deeper (5 Whys)

• Untrained Staff : Why? No formal training program.
• Aged Machinery : Why? No budget allocated for equipment upgrades.

After analyzing the Fishbone Diagram, you realize that untrained staff and aged machinery are your primary culprits. Your next steps could involve investing in staff training programs and allocating budget for machinery upgrades.

By following these steps, you can develop targeted strategies to improve product quality significantly.

Common Mistakes and Tips: How to Make the Most of Your Fishbone Diagram

1. overlooking minor causes.

While it’s easy to focus on the most glaring issues, minor causes can accumulate and have a significant impact.

Tip : Don’t disregard a cause just because it seems minor. Sometimes, fixing smaller issues can lead to big improvements.

2. Ignoring Data

It’s tempting to rely solely on brainstorming and intuition, but data should be your guiding star.

Tip : Use metrics and KPIs to support or refute the causes you’ve identified. This adds credibility to your findings and helps you prioritize effectively.

3. Stopping at Symptoms

Identifying symptoms is just the first step; your ultimate goal should be to uncover the root causes.

Tip : Use techniques like the “5 Whys” to dig deeper into each cause and ensure you’re addressing the root of the issue, not just its manifestations.

Fishbone Diagrams are a fantastic asset in the toolbox of anyone interested in continuous improvement. Whether you’re a seasoned professional or just getting started, this simple yet powerful tool can help you dissect complex problems and develop targeted solutions.

They encourage you to look beyond the obvious and delve into the intricacies that contribute to each problem. So go ahead, grab that pen and paper (or a whiteboard, if you’re feeling fancy), and start your journey towards effective problem-solving.

• Ilie, G. and Ciocoiu, C.N., 2010. Application of fishbone diagram to determine the risk of an event with multiple causes.   Management research and practice ,  2 (1), pp.1-20.
• Coccia, M., 2018. The Fishbone diagram to identify, systematize and analyze the sources of general purpose Technologies.   Journal of Social and Administrative Sciences ,  4 (4), pp.291-303.

Q: What is the origin of the Fishbone Diagram?

A: The Fishbone Diagram was originally developed by Dr. Kaoru Ishikawa, a Japanese quality control statistician, in the 1960s. It’s also sometimes referred to as the Ishikawa Diagram in his honor.

Q: Can Fishbone Diagrams be used for non-manufacturing problems?

A: Absolutely! While Fishbone Diagrams are popular in manufacturing and quality management, their application is not limited to these areas. They can be used in healthcare, software development, event planning, and even for personal problem-solving.

Q: How many main categories should my Fishbone Diagram have?

A: The number of main categories can vary depending on the complexity of the problem. However, it’s generally advisable to have between 4-6 main categories for easier analysis and readability.

Q: Can I use software to create a Fishbone Diagram?

A: Yes, there are several software tools available for creating Fishbone Diagrams, such as Microsoft Visio, Lucidchart, and various other project management software options. However, a simple pen and paper or a whiteboard can be just as effective for smaller teams or simpler problems.

Q: How do I know which causes to prioritize after creating a Fishbone Diagram?

A: After creating your Fishbone Diagram, you should analyze it with your team to identify the most likely root causes of the problem. Using data to support your conclusions can be very helpful. You may also employ techniques like the Pareto Analysis to prioritize causes based on their impact.

Daniel Croft

Hi im Daniel continuous improvement manager with a Black Belt in Lean Six Sigma and over 10 years of real-world experience across a range sectors, I have a passion for optimizing processes and creating a culture of efficiency. I wanted to create Learn Lean Siigma to be a platform dedicated to Lean Six Sigma and process improvement insights and provide all the guides, tools, techniques and templates I looked for in one place as someone new to the world of Lean Six Sigma and Continuous improvement.

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Table of Contents

What is a Fishbone diagram?

Fishbone diagrams explained.

A fishbone diagram (also known as an Ishikawa fishbone diagram) is an effective problem-solving tool. Instead of focusing on a quick fix, creating a fishbone diagram helps to identify the root cause of a problem and find a long-term solution.

As a type of cause and effect diagram , the “fishbone” name comes from the diagram’s resemblance to a fish skeleton. A fishbone diagram consists of three main categories:

There’s a fish head at the head of the diagram, where you’ll outline the problem you’re trying to solve. The rest of the diagram branches out from here.

The spine stems from the head of the diagram (the problem statement), providing the outline of the fish. At the end of each spinal bone is a category that needs to be considered as part of the problem-solving process.

Branching out from each spinal bone, you’ll see a smaller rib bone. This is where the possible causes will sit to help you pinpoint the potential cause of the problem.

Benefits of fishbone diagrams

Fishbone diagrams are useful tools for improving existing processes and pinpointing causes of issues. Take a look at some benefits of performing a fishbone diagram root cause analysis:

Easily find the root cause of a problem

A fishbone diagram is a visual tool that adds structure and clarity to problem-solving. It indicates the problem and its possible causes in a single location, making it easier for teams to conduct a root cause analysis .

Prevent further problems

By finding the root cause of the problem, you fix the problem at its source and mitigate future issues. As a result, you’re far more likely to prevent the same (or similar) problems from cropping up in the future.

Collaborate with your team

A fishbone diagram is a great way to work with your team to brainstorm solutions . It’s a collaborative diagram, encouraging teams to review all the available information and discuss the best course of action.

If you’re part of a remote or hybrid team, an online platform like Miro allows you to collaborate with your team, no matter where they work. Simply share the diagram and hop on a video chat, and you can perform your root cause analysis virtually.

Example of a fishbone diagram

To see a fishbone diagram in action, look at this CEDAC Template from NEXT LEVEL Partners.

CEDAC is an acronym for Cause and Effect Diagram with the Addition of Cards. The diagram contains issues on the left-hand side of the ribs and solutions on the right-hand side.

Its inventor, Ryuji Fukuda, created CEDAC so that teams can delve deeper into their problem-solving analyses. By adding cards to the diagram, teams have a way of questioning existing information and suggesting new ideas. As a result, they’ll gain a deeper understanding of their problems and how to solve them.

Here are some of the common areas where the CEDAC model can be helpful:

Product development

Visualize issues with product development using the CEDAC diagram. Collaborate with the product team to identify the cause of the problem and use cards to identify the best possible solution.

Software features

Effectively allocate resources based on team structures and capabilities. Understand the most critical problems to solve and how they map together.

Product design

Define failures or problems with your product design, and identify effective solutions. Using the diagram’s cards, product designers can generate new and creative solutions to improve the design.

Internal processes

Pinpoint bottlenecks and figure out how to streamline and improve your business processes. Encourage team members to join in the discussion and make suggestions for improving the process going forward.

When to use a fishbone diagram

Take a look at some of the different instances when using a fishbone diagram can be useful for you and your team.

1. To analyze a problem statement

If you have a clear problem statement for your business, a fishbone diagram is a great way to analyze it in detail. You can see the problem’s culprit and decide how to fix the issue.

2. To brainstorm the causes of the problem

Also known as root cause analysis, a fishbone diagram allows you to discuss the potential causes of a problem. It’s the perfect opportunity to host a brainstorming session to identify pressing concerns and work through possible solutions.

3. To analyze a new product design

Use a fishbone diagram to map your new product design and visualize any potential hurdles before they come your way. As a result, you can put preventative measures in place before going live.

4. To improve your processes

If you’re struggling to streamline your processes and inefficiencies, a fishbone diagram can help. Use a fishbone diagram to pinpoint the troublesome areas of your process and find the cause of a problem. From there, you can determine exactly how to fix it.

5. For quality improvement

Use a fishbone diagram to visualize how and where you can improve to offer your customers a higher-quality experience. For example, you might want to improve the quality of your customer service. In this case, you can use the diagram to find areas for improvement in your existing processes.

How to make a fishbone diagram

Follow these simple steps to create an effective fishbone diagram:

1. Select the Fishbone Diagram Template

While you can always build your own diagram from scratch, you can also get a headstart by selecting one of these Fishbone Diagram Templates . It’s free and easy to use, so you can start mapping your diagram immediately.

2. Outline your problem statement

When your diagram is ready to use, start by defining the problem. Otherwise known as a problem statement, this will sit at the head of the diagram. This must be as clear and concise as possible to find the right solution.

For example, in the diagram below, the main problem is that “40% of users cancel the subscription in the first month.” This statement clearly describes the problem and offers a solid starting point for finding a solution. Now, let’s consider how this would work if the statement were written differently — for example, “to increase customer retention.”

This statement is pretty vague, and there’s a lot of room for interpretation. Instead of focusing specifically on how to keep existing customers after the first month, teams might explore other avenues that won’t necessarily solve the actual problem.

The problem statement doesn’t have to be long and detailed. In fact, you should keep it short — ideally, no longer than a sentence. That way, it’ll be easy for your team to see the problem and won’t overcrowd the diagram. But the problem statement should always be clear and concise, leaving no room for interpretation.

If you’re new to problem statements or want a framework to guide you, look at Prime Motive’s Problem Framing Workshop Template .

3. Pinpoint your root causes

With your problem statement in place, you can now branch out and start to pinpoint the possible causes of the problem.

The specific causes will depend on what your problem statement is. For example, if your problem statement is related to product design, your root causes could include the following:

These are just a few examples. In your diagram, you might find that you have more or fewer root causes. With an intuitive platform like Miro, it’s easy to add or remove boxes based on how many you need.

When adding causes to your diagram, those with the biggest impact should be closest to the problem. The farther away a cause is from the head of the diagram, the less influence it has on the problem.

4. Identify individual causes

You can now identify the individual elements that contribute to the overall cause. These are the bones of the fish.

Let’s use an example to demonstrate how this works. Imagine that one of your root causes is “Equipment.” Here are some of the individual causes that might sit under this area:

You are using outdated and inefficient equipment

It’s expensive to replace existing equipment

There aren’t enough employees who know how to use the equipment

All of these elements could contribute to the problem you’re facing, but it’s up to you and your team to pinpoint the key elements at the root of the problem. Review all this information with your team, and you’ll be able to see which problem is most likely to have a long-term solution.

If you’re unsure how to identify the individual causes, look at the 5 Whys framework . It’s a simple brainstorming tool that helps teams explore the reasons behind a potential problem.

5. Create a plan of action

After working with your team to find the root cause of the problem, you can create an action plan for improvements. This involves mapping out the steps you need to take to solve your problem and how you’ll measure success (we suggest using the SMART Goals framework for this).

During this stage, be sure to focus on how to make lasting improvements. Don’t lose sight of the bigger picture in favor of a quick fix. The purpose of the fishbone diagram is to implement a long-lasting solution to your problem, so keep this in mind when creating your plan of action for the future.

Fishbone diagram categories: the 6Ms of production

The fishbone diagram is used across various industries, but the original diagram was created to improve the manufacturing process. The six methods (6Ms) of production come from this original diagram, and engineers and designers would use this structure to cover all their bases.

The 6Ms of production are as follows:

1. Manpower

The functional activity involved in designing and delivering a product.

The production process and any other processes that contribute to the delivery of the final product.

Any systems, tools, or equipment used in manufacturing.

4. Material

The raw materials and components needed to create the end product.

5. Milieu (or Mother Nature)

Any environmental factors, such as weather, floods, or fire. Although most milieu factors can’t be controlled, there are some instances where businesses can put preventative measures in place to mitigate problems.

6. Measurement

The physical measurements (volume, distance, temperature, and so on) of a product, machine, or workspace.

The 6Ms are only relevant if you’re using the fishbone diagram to improve a manufacturing or production process. If you’re using the diagram for any other purpose, there’s no need to follow this structure.

Find solutions faster with a fishbone diagram

When facing a problem, finding the right solution often comes down to understanding its root cause. That’s where a fishbone diagram can make a real difference. By visually breaking down the potential causes of an issue, the diagram helps you and your team stay focused, organized, and on track—leading to quicker and more effective solutions.

The structured layout of a fishbone diagram allows you to systematically explore each factor contributing to the problem. Instead of jumping to conclusions or missing important details, you can see how various causes connect and identify the one that needs the most attention. This logical approach helps reduce wasted time spent on irrelevant areas, allowing you to move more quickly toward the solution.

Miro’s innovation workspace makes the process even faster. With ready-made fishbone diagram templates and automated diagramming tools, you can set up your analysis with just a few clicks. This saves time and ensures that your focus remains on solving the problem rather than the mechanics of building the diagram. Happy diagramming!

Discover more

How to build a fishbone diagram, fishbone diagram examples, what is a cause and effect diagram, what is root cause analysis, what is the 5 whys framework, 5 whys: examples, explanations, and how to find the causes of problems, get on board in seconds, plans and pricing.

What is a Fishbone Diagram

A fishbone diagram is a powerful problem-solving tool used in healthcare, engineering, and many other industries. Find out how you can use Lucidchart, Visio, and Excel to construct a fishbone diagram. Check out Lucidchart's free fishbone diagram examples and templates.

What is a fishbone diagram?

A fishbone diagram is also known as an Ishikawa diagram, herringbone diagram, or cause-and-effect diagram. This is because it describes the potential causes of a given problem or outcome. The diagram resembles an actual fish bone, with a long line running down the center pointing to the main outcome, also called the "problem statement". The other bones branch out from the middle bone and represent different categories of causes. In the template below, we've shown the six standard categories, Measurements, Materials, People, Machine, Methods, and Environment. However, feel free to swap these out for categories that best fit your problem.

Learn to use Lucidchart in 5 minutes

• Use our Fishbone Diagram Maker to create your first online chart from a template or blank canvas or import a document.
• Add text, shapes, and lines to customize your flowchart.
• Learn how to adjust styling and formatting within your flowchart.
• Locate what you need with Feature Find.
• Share your flowchart with your team to start collaborating.

What is a cause and effect analysis?

A cause and effect diagram is also known as a fishbone diagram due to its appearance. Cause and effect analysis can be used in a wide variety of industries, including engineering, marketing, and manufacturing. It was invented by Kaoru Ishikawa as a way to pinpoint contributing factors in business problems, especially in the field of industrial manufacturing. When conducting cause and effect analysis, teams start with a problem or challenge, then look at which roadblocks stand in the way of success.

Make a fishbone diagram in Lucidchart

You can make your own fishbone diagram with Lucidchart. To design the skeleton, simply use the line tool by clicking the "L" key. A crosshair will appear and let you draw a line. Easily add lines to the template below, and then drag out text boxes onto the lines to properly label them. Lucidchart also supports a variety of convenient features that make diagramming easy, like draggable resizing, pop-out context menus, and custom image upload. And once you’ve finished perfecting your diagram, you can share or publish it online.

How to create a fishbone diagram from a template or new document

It’s simple to create your own cause and effect analysis example by using Lucidchart. It’s professional diagramming software that runs seamlessly in your browser. This example shows the brainstorming process for a marketing team that’s trying to understand why website traffic has dipped. Open our editable template to start tackling your own business’s obstacles.

Get started in Lucidchart

• Register  for a Lucidchart account.
• Navigate to My Documents.
• Click Create > New Document.
• Explore and start with a fishbone diagram template or create a new document in Lucidchart.

Lucidchart has several fishbone diagram templates, covering various levels of complexity. Click the arrow next to “+Document” to open Lucidchart’s template library. To read about a template, simply click on it once—this will give you a closer look at the template and recommended uses. When you’ve found a template that suits your needs, select it and click “Create Document.” (To use the template below, click on the image.)

Determine your problem statement

5. The first thing you need for your fishbone diagram is a problem statement. Since fishbone diagrams are used to analyze cause-and-effect relationships, the problem statement is your final effect or result. Drag out a box from the toolbox in Lucidchart (it’s accessible from the left side of the screen), then double-click to label it accordingly. Depending on your industry and use case, the problem could be anything from “shipments arrive late” to “patient readmitted to the hospital.” Once you have the problem statement, draw a line out from it. Your line will be shorter or longer depending on how many categories you want to include.

List categories

6.  Next, you’ll add lines and corresponding boxes to show the categories of causes for your problem statement. It might be helpful here to think backwards. First, determine all the potential causes for a problem, and then group them into categories. The traditional categories for a fishbone diagram are the six M's:

• Measurements
• Mother Nature

If you’re not sure what to include, these categories are a great first step. You are also free to choose your own, more specific categories, depending on what best fits your diagram.

7. To add causes, draw new lines from the category lines and label them with text boxes. To draw a line without dragging it out from a shape, simply hold down the L key and crosshairs will appear. Click on any line again to angle it or rotate it. Remember to add as many causes as you can think of, even if some of them are less likely to occur than others. The more details you have, the easier it will be to analyze your problem.

Review your work

After you’ve completed the document, it’s time to review. Make sure your text is error-free and large enough to read. Did you include all relevant information, and is it organized under the right categories? Try sending a URL to a colleague and inviting them to comment or collaborate with you.

Compatible with Microsoft Visio

If you’re concerned about choosing Lucidchart over Visio, rest assured that our program is fully Visio-compatible. As the best  Visio alternative , you can open nearly any Visio file that’s sent to you with Lucidchart’s Visio import option, which is free for everyone. With a Pro account, you can also edit the document or export a Lucidchart document to .vdx format. You’ll never regret switching to Lucidchart: it’s more affordable, easier to use, and built for true collaboration.

How to add a fishbone diagram in Excel

1. Download the  MS Office Add-On  if you haven’t already

2. Use a template like the one below or create a new fishbone diagram in Lucidchart.Use this guide to learn  how to make a flowchart in Lucidchart  if you need help getting started.

3. Open your Excel sheet, go to your Lucidchart Add-In.

4. Select your diagram from your list of Lucidchart documents and insert it into your Excel sheet.

If you want to learn more about creating fishbones with Lucidchart, check out our  in-depth tutorial . If you’d like another free fishbone template, try our  fishbone example page . It’s easy to make these diagrams your own; simply drag and drop elements to rearrange them. Several types of images, including JPGs, PNGs, and SVGs, can be uploaded for even more customization.

Fishbone diagram for service industry example

Fishbone diagram

Fishbone diagram with sub-causes

Ishikawa diagram example

Ursache-Wirkungs-Diagramm – Beispiel

Fishbone diagram worksheet

Helpful resources, fishbone diagram maker.

A thorough fishbone diagram can not only help your team collaborate to identify problems, but it can also help you save time and resources.

Make a Fishbone Diagram in Word

This step-by-step guide will explain how to make fishbone diagrams in Microsoft Word, both from scratch and using a Lucidchart template.

Make a Fishbone Diagram in Powerpoint

Use this guide to learn how to create fishbone diagrams in both PowerPoint and Lucidchart.

Follow the link to see the current Lucidchart pricing. You can try Lucidchart for free with 3 editable documents.

It’s easy to add, modify, and format lines in Lucidchart. Click and drag lines or use smart lines for a more streamlined experience.

Lucidchart makes it simple to add and format text anywhere in your diagram. Further manage your text by adding or uploading fonts and using our grammar tools.

Our template gallery offers over 900 templates and examples—with more being added weekly. These templates include network diagrams, Gantt charts, Kanban boards, simple and complex flowcharts, and more.

Click the link below to learn how to Install the lucidchart, Lucidspark, and Lucidscale add-ons for Google Docs, Sheets, and Slides.

Lucidchart is a visual workspace that combines diagramming, data visualization, and collaboration to accelerate understanding and drive innovation. Want to make a Fishbone diagram of your own? Try Lucidchart. It's quick, easy, and completely free.

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Follow this step-by-step guide to learn how to manually make a fishbone diagram in MS Word.

Creative Problem Solving Guide

• Creative Problem Solving
• Affinity Mapping
• The 5 Why's
• Six Thinking Hats
• Agile Learning
• Mental Agility
• Brainstorming
• Mind Mapping
• Lateral Thinking
• SWOT Analysis
• Ishikawa's Fish Diagram

Ishikawa's Fish Diagram

Ishikawa’s Fish Diagram, also known as a fish diagram, herringbone diagram , or cause-and-effect diagram , is a causal diagram that represents the potential causes of a specific event or outcome. 

It is primarily used in product design and quality control to identify factors contributing to a particular issue. Causes are grouped into categories, helping to pinpoint the root factors that the diagram aims to address. 

History of Ishikawa's Fish Diagram

• Famous uses of Ishikawa's Fish Diagram

A brief history of Ishikawa’s Fish Diagram 

A creative problem-solving method introduced through the kansei engineering model by the Japanese organisational theorist and professor, Karou Ishikawa. He formally presented the; now coined, ‘Ishikawa’ diagram in 1954 within his book, ‘Introduction to Quality Control’. The diagram was produced as a Root Cause Analysis diagram to organise issues within Quality Management.  

A useful anecdote is that the Root Cause Analysis diagram stemmed from that of Sakichi Toyoda, the founder of Toyota Industries and the creator of the “5 Why’s” methodology. 

Famous uses of the Ishikawa Fish Diagram 

In 1952, Kawasaki Iron Fukiai Works adopted the use of the Ishikawa Diagram to effect standardisation and control. It has since been adopted by a variety of manufacturers and their workplaces. 

Kansei ‘感性’ engineering, also known as emotional engineering, is the theory that emotions such as joy and excitement are as crucial as technical specifications. Kansei is a key design concept for Mazda, which led them to using Ishikawa’s Fish Diagram for their production of the Miata; MX-5, to decide upon key features of the car to make it an attractive car for their target audience. Through using the diagram, Mazda concurred that the sports car should be 3.98 metres in length and be a 2-seater to suit the needs of their clientele.  

• How to use Ishikawa's Fish Diagram

How to use Ishikawa’s Fish Diagram 

For this example, the Ishikawa’s fish diagram has been used to outline the potential causes of a blurry photograph that has been taken. 

1. First, outline the issue (effect) that you wish to analyse. Write this problem statement at the head of the "fish," which is usually on the right side of the diagram. 

2. Next, draw the backbone of the fish and add diagonal lines (fishbones) extending from it, leading to the main categories. For example, in the ‘Blurry Photo’ scenario; as shown above, the following categories have been used: 

• Equipment 
• Process 
• Environment 

If you are having trouble identifying the main categories for your problem, you can start with these common examples and adjust them based on the situation: 

• People (e.g., skills, training) 
• Methods (e.g., processes, procedures) 
• Machines (e.g., equipment, tools) 
• Materials (e.g., raw materials, supplies) 
• Environment (e.g., physical conditions, work culture) 
• Measurement (e.g., data collection, accuracy) 

3. Once the categories are established, begin brainstorming potential causes for the problem. To dig deeper into these causes, ask "why" multiple times to explore root causes. 

4. Finally, draw smaller lines branching off from the main fishbones to represent these primary causes. If necessary, you can add secondary lines for more detailed causes. The aim is to filter your results, so be cautious about an overflowing diagram which may lead to other problems. Ishikawa himself advises that diagrams should be adequately filled yet not too generalised in their approach as poorly produced cause and effect diagrams cause confusion. 

Once the causes have been identified, you can develop an action plan to address the initial issue. For example, in the case of the “Blurry Photo,” pinpointing the specific cause makes it easier to take targeted steps to eliminate the problem. 

After implementing the changes highlighted (such as replacing the lens, cleaning the lens, adjusting the environment), you should monitor the outcomes to ensure that the problem is resolved.  

Overall, the Ishikawa Diagram is mostly used for quality control within engineering, though can be used to approach elements of problem solving within different subjects too.

Frey, D.D., Fukuda, S., Rock, G. and ISPE International Conference on Concurrent Engineering (2011). Improving Complex Systems Today: Proceedings of the 18th ISPE International Conference on Concurrent Engineering. doi: https://doi.org/10.1007/978-0-85729-799-0.

Hagiwara, S. (n.d.). Design with a Human Touch - Mazda Stories. [online] mazdastories.com. Available at: https://mazdastories.com/en_us/inspire/kansei-human-touch/.   

Ishikawa, K. (1976). Guide to Quality Control. New York: Unipub/Quality Resources. 

Ishikawa, K and Lu, D.J. (1985). What Is Total Quality Control?: the Japanese Way. Englewood Cliffs: Prentice-Hall. 

Mazda (2022). Mazda Dictionary - Mazda Stories. [online] Available at: https://mazdastories.com/en_us/inspire/mazda-dictionary/  

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