Extreme Users

Purpose

Extreme Users shifts the design lens from average users to the outliers — people who use a product/service far more, far less, or in completely unexpected ways. Their amplified needs and creative workarounds reveal latent requirements and innovation opportunities that designing for the mainstream would miss.

At a glance

• Group size: 3–8
• Duration: 35 minutes
• Difficulty: Moderate
• Facilitation style: Research framing followed by guided discussion
• Setting: Workshop room; ideally follows prior user research

How to run

1. Define the extremes (5 min): Identify 2–3 dimensions relevant to your challenge (frequency of use, expertise level, emotional intensity, physical ability). Place them on a spectrum.
2. Profile extreme users (10 min): For each end of each spectrum, describe who this person is. What are their goals? Frustrations? Workarounds? Use real data if available, or create evidence-based personas.
3. Generate insights from extremes (10 min): For each extreme user, ask: "What do they need that average users don’t?" "What have they already built or hacked?" "What would delight them?"
4. Transfer to mainstream (5 min): Identify which extreme-user needs would also benefit mainstream users if addressed.
5. Prioritise ideas (5 min): Vote on the most promising ideas that emerged from the extreme lens.

Materials needed

• User spectrum template (printed or on whiteboard)
• Sticky notes and markers
• User research data (if available)
• Dot stickers for voting

Pitfalls & common mistakes

• Confusing extreme with rare: Extreme users are not edge cases to ignore — they are amplifiers of universal needs.
• Only looking at power users: Non-users and reluctant users are equally extreme and equally valuable.
• Stereotyping: Base extreme profiles on evidence, not caricature.
• Never transferring back: Insights about extremes that stay in the extreme are not actionable for the product.

Inclusion & accessibility

• Include disability and accessibility as legitimate extreme dimensions — designing for these extremes often benefits everyone (curb cut effect).
• Involve actual extreme users in the session when possible, not just proxies.
• Avoid framing "extreme" as negative — these are valuable perspectives, not problems.

Variations

• Extreme user interviews: Interview real extreme users before the workshop to feed actual data.
• Extreme scenario mapping: Combine with scenario mapping to imagine extreme contexts (emergencies, celebrations, first use, thousandth use).
• Lead user method: Focus specifically on users who have already innovated solutions for themselves (von Hippel).

When NOT to use this

• When the product must serve a tightly defined average user and outliers are genuinely out of scope.
• When the team has no research data and would be inventing extreme users from imagination.
• When stakeholders are not prepared to hear uncomfortable truths from the margins.

Source & further reading

• d.school, Stanford University — "Extreme Users" method card
• von Hippel, Eric — *The Sources of Innovation* (Oxford University Press, 1988)
• IDEO — *The Field Guide to Human-Centered Design* (2015)