Identify your bullseye customer in one day | Michael Margolis (UX Research Partner at GV)
Executive Summary
Lenny's Podcast episode, sponsored by Eppo and Paragon, in which Lenny Rachitsky talks with Michael Margolis, UX research partner at Google Ventures for nearly 15 years and author of the free book Learn More Faster, about identifying your bullseye customer in a single day. Margolis, who helped develop the Design Sprint and has worked with over 300 companies, defines the bullseye customer as the very specific subset of your market most likely to adopt first - Amazon started with books, Facebook with college profiles. His one-day formula is five and three in one: five bullseye customers, three simple prototypes, interviews conducted in one day while the whole team watches and debriefs. The payoff is depth of understanding, prioritization of feedback, and team alignment on what to build first. PARTIAL COVERAGE: this summary highlights the framework; the recruiting and interview tactics are not covered. These are Margolis's own methods, not independently verified.
Key Takeaways
Bullseye defined
The specific subset most likely to adopt first - not the whole market you eventually want.
Start narrow like Amazon
His proof points: Amazon sold only books; Facebook was only college profiles.
Five and three in one
His formula: five bullseye customers, three simple prototypes, one interview day.
Team watches live
The whole team observes and debriefs the same day, creating instant shared alignment.
Feedback prioritizer
A clear bullseye tells you whose feedback counts and whose to ignore for now.
Thirty years distilled
The method compresses ethnographic research learned at Walmart speed and Google scale.
Bullseye defined
The specific subset most likely to adopt first - not the whole market you eventually want.
Start narrow like Amazon
His proof points: Amazon sold only books; Facebook was only college profiles.
Five and three in one
His formula: five bullseye customers, three simple prototypes, one interview day.
Free book
Learn More Faster is free as a PDF; he wants fewer products nobody needs.
The Conversation Breakdown
Bullseye defined
⏱ Untimed topicThe specific subset most likely to adopt first - not the whole market you eventually want.
Start narrow like Amazon
⏱ Untimed topicHis proof points: Amazon sold only books; Facebook was only college profiles.
Five and three in one
⏱ Untimed topicHis formula: five bullseye customers, three simple prototypes, one interview day.
Team watches live
⏱ Untimed topicThe whole team observes and debriefs the same day, creating instant shared alignment.
Feedback prioritizer
⏱ Untimed topicA clear bullseye tells you whose feedback counts and whose to ignore for now.
Thirty years distilled
⏱ Untimed topicThe method compresses ethnographic research learned at Walmart speed and Google scale.
Bullseye defined
⏱ Untimed topicThe specific subset most likely to adopt first - not the whole market you eventually want.
Start narrow like Amazon
⏱ Untimed topicHis proof points: Amazon sold only books; Facebook was only college profiles.
Five and three in one
⏱ Untimed topicHis formula: five bullseye customers, three simple prototypes, one interview day.
Free book
⏱ Untimed topicLearn More Faster is free as a PDF; he wants fewer products nobody needs.
Core Frameworks & Ideas
Bullseye screen - Margolis's focus
Define the narrow adopter subset before building anything.
5-3-1 research day - his sprint
Five customers, three prototypes, one day, full team present.
Prototype ladder - his comparison method
Three rough alternatives reveal preferences one polished option cannot.
Bullseye screen - Margolis's focus
Define the narrow adopter subset before building anything.
5-3-1 research day - his sprint
Five customers, three prototypes, one day, full team present.
Prototype ladder - his comparison method
Three rough alternatives reveal preferences one polished option cannot.
Actionable Next Steps
- ✓Write a one-paragraph description of your bullseye customer.
- ✓Sketch three rough versions of your core offer to compare.
- ✓Schedule five customer interviews on a single day.
- ✓Invite the whole team to watch one user session this month.
- ✓Write a one-paragraph description of your bullseye customer.
- ✓Sketch three rough versions of your core offer to compare.
- ✓Schedule five customer interviews on a single day.
- ✓Invite the whole team to watch one user session this month.
Notable Quotes
“five and three in one”
“the very specific subset of your target market who initially is most likely to adopt”
“Amazon started just selling books”
“five and three in one”
“the very specific subset of your target market who initially is most likely to adopt”
“Amazon started just selling books”
The One Thing to Remember
Michael Margolis's one-day bullseye: five target customers, three rough prototypes, one day of interviews the whole team watches.