Key takeaways
Affinity diagrams transform scattered brainstorm outputs into organized, actionable clusters by grouping related ideas.
The method works best with at least 15 idea contributions, making it ideal for large teams tackling complex problems.
Silent ideation and grouping reduce bias and give every participant an equal voice in the process.
Keep your categories broad and your individual ideas specific to make patterns easier to identify.
Affinity diagramming is one of the seven management and planning tools and is widely used in UX research to organize qualitative data, such as survey responses and interview notes.
Lucid's infinite canvas, AI capabilities, Containers, and collaboration features allow distributed teams to run affinity sessions asynchronously or in real time.
If you've never experienced a disorganized brainstorming session, here's what it's like: The team shows up with different understandings of the purpose, one person contributes most of the ideas, and another checks out entirely. The ideas that emerge are hard to make sense of and less creative than they could be. An affinity diagram fixes that.
The affinity diagramming method involves your entire team in generating ideas, categorizing thoughts, and prioritizing topics. Affinity diagrams are especially useful for sorting and organizing large numbers of ideas, making them great for big teams and complex problems. They also create an environment where everyone has a voice and early-stage conflict is minimized, so the group captures more natural, authentic ideas before overanalyzing them.
What is an affinity diagram?
An affinity diagram is a visual method for organizing large amounts of unstructured data—ideas, observations, research findings—into meaningful groups. Teams use them to make sense of messy inputs and find patterns that guide decisions.
Japanese anthropologist Jiro Kawakita developed the technique in the 1960s, which is why you'll also hear it called a KJ diagram or the KJ method. Other common names include affinity chart and affinity map.
Today, affinity diagrams are standard practice across business, product development, and research. They're one of the seven new management and planning tools widely adopted in Lean and Six Sigma workflows. UX researchers also rely on affinity mapping to synthesize qualitative data from contextual inquiries, user interviews, open-ended survey responses, and support logs.
When should you use an affinity diagram?
Use an affinity diagram when you need to make order out of chaos. Two situations especially call for this approach:
Solving a complex problem. When the issue requires sorting through a large volume of data—like overhauling a product's user experience—an affinity diagram helps you see connections and root causes you might otherwise miss.
Gathering unique viewpoints. Because the early stages are self-directed and silent, every participant generates ideas independently. This surfaces perspectives that groupthink often buries.
Teams also turn to affinity diagramming to:
Organize the results of a brainstorming session.
Improve processes by identifying bottlenecks and inefficiencies.
Mediate professional conflict by surfacing shared concerns.
Develop innovative solutions through unexpected pattern recognition.
Drive group consensus on priorities and next steps.
How do you create an affinity diagram?
A virtual whiteboard makes it easy for distributed teams to collaborate in real time or asynchronously. Here's how to create your own affinity diagram.
1. Choose a facilitator
Designate someone to facilitate the session. This person decides how long the brainstorm will run, sets up the board, and coordinates each step. A clear leader keeps the process moving and ensures everyone follows the same rules.
2. Prepare your board
Create a brainstorming board in Lucid and share it with participants. Invite people with diverse perspectives—the more viewpoints, the richer your data. That said, keep the working group small enough for meaningful participation when it's time to sort and label ideas.
3. Present the problem
Define the problem clearly and make it visible at the top of the board. Phrase your prompt as a question to focus participants on solutions rather than symptoms. For example, "How can we improve time management at the office?"
4. Start the brainstorm
Have each team member add ideas independently. In Lucid, you can assign each participant a collaborator color so contributions are easy to track. Encourage volume and variety—this isn't the time to edit. Most teams conduct this phase in silence to avoid anchoring bias, and a timer helps keep the session focused.
5. Organize the ideas
With the help of your team, group related ideas into themes by dragging and dropping them into containers. Delete duplicates as you go. If an idea fits multiple categories, add it to both. If an idea doesn't fit anywhere, leave it on its own, as it may reveal something significant later. The facilitator may suggest labels, but the final groupings should reflect the group's consensus.
To save time, consider using Lucid AI during this step. In seconds, it can automatically sort your sticky notes into AI-generated categories, making it easy to visualize connections and trends.
6. Step back and label
Bring the group together to agree on a label for each idea cluster. Use the most representative note as inspiration or write a new title. If related clusters belong to a larger theme, add a higher-level "superheader" to combine them. Look for patterns: Which clusters are largest, and which reveal root causes? These insights guide your next steps, whether that's prioritizing initiatives or defining solutions.
Affinity diagram example
Imagine a content team wants to identify friction points in their publishing workflow. They title a Lucid board "What are the glitches in our content creation process?" and share it with writers, editors, and stakeholders.
Over a few days, participants add ideas asynchronously. The facilitator then schedules a meeting where the team groups notes into categories, like approval delays, inconsistent style, missing assets, and unclear ownership. Giving titles to each grouping helps the team see that most glitches trace back to two root causes: handoff confusion and the lack of a single source of truth. From there, the team can prioritize fixes and assign owners.
A few tips to get the most from any affinity session:
Aim for volume. Sessions work best with more than 15 contributions.
Keep containers broad and ideas specific. Broad themes make patterns visible, while specific notes preserve context.
Don't edit ideas during brainstorming. Editing on the fly discourages contributions.
Keep ideation and grouping silent. Silence reduces anchoring and lets quieter voices contribute equally.
Don't overthink groupings. Themes will shift, and perfectionism only slows the process.
Allow extra time for distributed teams. If participants span time zones or the problem is complex, let the board stay open for a day or two.
How Lucid can help you build affinity diagrams
Lucid’s infinite canvas means you'll never run out of space for ideas, and real-time updates with automatic saving keep everyone in sync—whether the team is collaborating live or working asynchronously.
Start with an affinity diagram template, build the visual manually, or use Lucid AI to generate an affinity diagram from a text prompt.
Master the basics of Lucidchart in under 5 minutes with this quick tutorial. Learn how to create professional flowcharts, customize shapes with company colors, and share documents with your team for real-time collaboration. Whether you are a beginner or transitioning from Visio, this guide helps you visualize complex processes and streamline your workflow today.
