Product design question
How would you design an alarm clock for a deaf person?
- Product design
- Medium
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What this question tests
Product design for a sensory substitution use case, requiring genuine consideration of the accessibility need.
How to approach it
- Define the user: deaf or hard of hearing individuals who cannot rely on an audible alarm sound to wake up.
- List pain points: existing alarms depend on sound, leaving this user group without a reliable wake up method.
- Prioritize non-audio alerting: strong vibration under the pillow or mattress paired with flashing light in the room.
- Design for reliability: ensure the alarm can still function if a paired phone dies or loses connection, since safety depends on it.
- Consider a snooze and stop mechanism accessible without needing to read small text half asleep.
- Define success as reliable wake up rate reported by users compared to their prior solution.
What a strong answer includes
- Centers non-audio alerting, vibration and light, as the primary mechanism rather than a louder sound as an afterthought fix.
- Addresses reliability explicitly, since a failed wake up has real consequences like missing work, unlike a typical convenience feature.
- Considers physical design, like a strong bed shaker, showing understanding of what's actually usable half asleep.
- Picks a meaningful outcome metric, reliable wake up rate, tied directly to the core safety need.
Common mistakes
- Treating this as a standard alarm clock with a stronger vibration bolted on without deeper accessibility thought.
- Ignoring reliability and failure modes, which matter more here than for a typical hearing user's alarm.
Likely follow-up questions
- How would you test reliability of the wake up mechanism?
- How would you handle a user who is a heavy sleeper even with vibration alone?
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Learn the skill behind it
Chapters of the AI PM course that teach what this question tests.
- Chapter 4: Discovery and strategy for AI products
- Chapter 7: AI UX and human oversight: design for a system that is wrong sometimes
- Chapter 14: Get the job: the AI PM interview loop