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Meetings & Communicationnoun · /ˈfɪʃboʊn ˈdaɪəɡræm/

fishbone diagram

In simple English

A fishbone diagram, also called an Ishikawa diagram or cause-and-effect diagram, is a structured brainstorming technique used in tech teams to break down complex problems. The diagram has a horizontal spine (representing the main problem) with diagonal branches (representing categories of causes) and smaller branches (representing specific contributing factors). In tech companies, teams use fishbone diagrams during post-mortems, troubleshooting sessions, and quality improvement meetings to visually organize why a system failure occurred, why a project missed a deadline, or why a bug slipped into production. The technique forces the team to think systematically about root causes rather than surface-level symptoms, making it valuable for preventing similar issues in the future.

Understand how to use a fishbone diagram to analyze and solve problems in software development and tech projects.

At a glanceCEFR B2
Commonness4/5
Versatility4/5
FormalityCasualFormalNeutral
Spoken ↔ WrittenSpokenWrittenBoth
Directness ↔ DiplomaticDirectDiplomaticDirect
RegionUS and UK
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Say it like this

Let us fishbone diagram this outage to understand what went wrong
We should build a fishbone diagram before jumping to conclusions
The fishbone analysis revealed multiple contributing factors

Real examples

in a post-mortem meeting

"We used a fishbone diagram to map out all the factors that contributed to the system going down."

in a planning session

"Before we fix this issue, let us create a fishbone diagram to ensure we address the root cause, not just the symptoms."

in a team chat

"I have created a fishbone diagram showing why the release was delayed. Check the shared document."

Don't say this

Handle with care. Do not confuse with actual fishbone structures in biology. In tech, it is always about root cause analysis, not a literal diagram of a fish skeleton.

We should fishbone diagram every small bug we find.
We should use a fishbone diagram for major incidents or recurring issues.Fishbone diagrams are most useful for significant, complex problems, not routine bugs. Using them for minor issues wastes time.
The fishbone diagram is just a brainstorm tool with no structure.
The fishbone diagram organizes causes into specific categories like people, process, technology, and environment.Fishbone diagrams have a defined structure with categorical branches, unlike unstructured brainstorming.
Once we create the fishbone diagram, we are done analyzing.
The fishbone diagram helps us identify root causes, which we then investigate and address.Creating the diagram is the first step in problem-solving. Action and follow-up are essential.

Other forms

noun

fishbone diagram

"The fishbone diagram clearly showed the multiple factors that caused the outage."

verb phrase

to fishbone diagram (or to create/draw a fishbone diagram)

"We should fishbone diagram this issue in our next meeting."

Often used with

create a fishbone diagramMost common way to express building one from scratch
draw a fishbone diagramUsed when physically sketching or visualizing the diagram
analyze with a fishbone diagramUsed to describe using it as a problem-solving method
root cause fishbone diagramEmphasizes the purpose of identifying underlying causes
Ishikawa diagramAlternative formal name for the same tool

Similar words

Ishikawa diagramFormal alternative name; named after Kaoru Ishikawa who developed it
cause-and-effect diagramMore descriptive name; emphasizes showing causes leading to an effect
root cause analysisThe broader process; fishbone diagram is one tool used in this process

Practice

Try it

4 quick exercises

Pick the most natural phrasing

1. Your API went down unexpectedly. How do you describe what to do next?

Complete the sentence

2. In our post-mortem, we will _______ the deployment failure to find the root cause.

Spot the mistake

3. Which sentence uses fishbone diagram correctly?

Rewrite naturally

4. Rewrite using fishbone diagram: 'We need to think about all the reasons why the database query was slow and organize them into groups.'

Questions

Quick poll

Have you said "fishbone diagram" in a standup this week?

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