Affinity Mapping & Research Synthesis
Part of the Product Management Roadmap
In short
After ten interviews you'll have hundreds of notes and a headache. Affinity mapping turns that pile into a few clear themes you can actually act on.
Clustering raw research notes (sticky notes, quotes, observations) into recurring themes — turning a pile of interview transcripts into a small number of actionable insights.
Think of it like this
Sorting laundry after a trip
You come back from a trip and dump the bag on the floor. Whites go together, colours together, things that need ironing go aside. Nobody told you the groups. They appear as you sort.
Watch it happen
From scattered notes to themes
1/5Each cell is one note from interviews about paying hostel fees. One fact or quote per note.
The big ideas
What you need to know
One idea per note
Split interview notes into atomic facts or quotes. Small notes are easy to move.
Group bottom-up
Let groups emerge from the notes. Don't start with categories you already had in mind.
Name groups as insights
"Payments" is a label. "Students don't trust that payments went through" is an insight.
Sort as a team
Different people see different patterns. Sorting together also builds shared belief in the findings.
Save yourself the pain
Common mistakes
Oops
Making one note per interview with a long summary.
Do this instead
Break each interview into many small notes so patterns across people can show up.
Oops
Forcing every note into a group.
Do this instead
Leave odd notes aside. Sometimes a lone note becomes important after more research.
Your mission
Synthesise someone's notes
Quick check
Which group name is the best insight?
Go deeper
- 1Take notes from 3-5 interviews (real or from public case studies) and cluster them into themes.
- 2Practice writing one clear insight statement per cluster.
- 3Learn to resist forcing data into themes you expected before you started.
More topics at this stop
User Interviews
Surveys & Questionnaires
User Personas
Jobs to Be Done (JTBD)
Empathy Mapping
Usability Testing
Contextual Inquiry
Customer Journey Mapping
Problem Validation
Assumption Mapping
Continuous Discovery Habits
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