Free Fishbone Diagram Template
What This Includes
- Problem statement box with guided formatting (measurable, bounded, specific)
- Six pre built main branches with 6M category labels
- Sub cause placeholder lines with brainstorming prompts for each category
- Alternative category labels for service and knowledge work (People, Process, Technology, Policy, Environment, Communication)
- Cause prioritization matrix with impact and likelihood axes
- Action plan table linking confirmed root causes to corrective actions, owners, and deadlines
Who This Is For
Conduct structured root cause analysis for defects, complaints, and non conformances
Facilitate team brainstorming sessions to diagnose recurring process problems
Run incident post mortems and failure investigations using a proven framework
Analyze patient safety events and adverse outcomes with structured cause categorization
How to Use This Template
Write a Specific Problem Statement
Fill in the problem statement box on the right side of the diagram. Be specific and measurable: "Defect rate on line 3 increased from 2% to 5% in March" is actionable. "Quality is bad" is not. The quality of the problem statement determines the quality of the entire analysis.
Brainstorm Causes by Category
Work through each category branch with your team. Use the brainstorming prompts to trigger ideas. For each potential cause, ask "why does this happen?" to identify deeper sub causes. Add sub branches as needed. Aim for 3 to 6 sub causes per relevant category. Capture every idea during the session; filter later.
Prioritize Using the Matrix
After brainstorming, transfer each identified cause to the prioritization matrix. Rate each cause on two axes: impact on the problem (low, medium, high) and likelihood that it is a contributing factor (low, medium, high). Causes in the high impact, high likelihood quadrant are your top priorities for investigation.
Assign Actions for Top Causes
Use the action plan table to document corrective actions for the 3 to 5 highest priority causes. Assign an owner, a deadline, and a verification method for each action. A fishbone diagram without an action plan is a brainstorming exercise that does not solve the problem.
What This Fishbone Diagram Template Covers
This template gives you a ready to use fishbone diagram structure with the standard 6M categories (Manpower, Methods, Machines, Materials, Measurements, Mother Nature) pre built as main branches. Each category includes guided prompts to help your team brainstorm specific causes rather than staring at a blank diagram. The template also includes a prioritization matrix for ranking identified causes by impact and likelihood after the brainstorming session.
The template works for any industry. Manufacturing teams use it for defect analysis. Service teams use it for customer complaint investigation. IT teams use it for incident post mortems. Replace the 6M category labels with alternatives that fit your context if needed.
Common Questions About Free Fishbone Diagram Template
Can I change the 6M categories to fit my industry?
Yes. The template includes an alternative set of category labels for service and knowledge work: People, Process, Technology, Policy, Environment, and Communication. Replace the 6M labels with whichever set matches your context. The branching structure works the same regardless of category names.
How many people should participate in a fishbone session?
Five to eight participants is ideal. Include people who directly work in the process being analyzed, a facilitator who manages the session structure, and at least one person from outside the immediate team who can ask naive questions. Fewer than four limits perspective diversity. More than ten makes facilitation difficult.
Can I use this template digitally for remote teams?
Yes. The template works in any whiteboard or diagramming tool that supports shapes and connectors. ClickUp Whiteboards, Miro, Lucidchart, and FigJam all support the fishbone structure. For remote sessions, share your screen with the template and have the facilitator add causes as the team brainstorms verbally.