Product design question
Design an alarm clock for the blind.
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What this question tests
Accessibility-first product design grounded in specific sensory constraints.
How to approach it
- Define the user: a blind or low-vision person who cannot rely on a visual display to set or read the time.
- Identify pain points with existing alarm clocks: visual-only displays, touchscreen controls with no tactile feedback, and visual-only alarm indicators.
- Prioritize audio and tactile interaction: voice-based time setting, spoken time announcements, and physical, distinctly-shaped tactile buttons.
- Design the alarm itself to use a distinct escalating sound plus optional vibration, avoiding reliance on any visual cue.
- Ensure compatibility with existing screen-reader habits and conventions blind users already rely on, rather than inventing a new interaction paradigm.
- Define success metrics: successful wake-up and set-time accuracy, validated with blind user testing.
What a strong answer includes
- Grounds design choices in concrete sensory needs, like tactile button shapes and audio-first setting, not just 'add voice control.'
- Explains why the alarm sound and vibration pattern design must be distinct and escalating, since a blind user can't glance at a snoozed display.
- Proposes testing with real blind users via existing accessibility organizations rather than assuming sighted-designer intuition is enough.
- Notes the importance of following established screen-reader and accessibility conventions instead of inventing new ones.
Common mistakes
- Treating this as the same problem as designing for the elderly, when blindness has distinct constraints.
- Relying on a touchscreen-only interface with no tactile or audio alternative.
Likely follow-up questions
- How would you validate this design with actual blind users?
- How would you handle multiple alarms without a visual list?
More product design questions
- Design a TV for a car.Google · Product design · Hard
- Design a refrigerator for the blind.Google · Product design · Hard
- How do you design a camera for the elderly?Google · Product design · Medium
- Redesign Twitter for eCommerce.Shopify · Product design · Hard
- How would you go about designing a new location sharing app for Google?Google · Product design · Medium
- How would you improve Google Home?Google · Product design · Easy
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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