Product Design: Independent Elevator Travel for People Who Are Blind
Company: Google
Role: Product Manager
Category: Product Design & Strategy
Difficulty: medium
Interview Round: Other
Design an elevator, or the experience of riding one, for passengers who are blind.
```hint Walk the trip without sight
Before proposing features, trace every moment where a sighted rider relies on their eyes, from finding the call button to knowing which door has opened and on which floor.
```
### Clarifying Questions
- Are the target riders fully blind, or should the design also serve people with low vision?
- Is this a new elevator product sold to buildings, or features that must be retrofitted into elevators already installed?
- What kind of building matters most: an office or apartment block the rider uses every day, or public places such as hospitals, hotels and transit stations where they arrive as visitors?
- Must the elevator keep working exactly as before for sighted riders who share it?
### What a Strong Answer Covers
- The full trip, from reaching the lobby to stepping out on the right floor, including lobbies with several cars and emergencies, not only the button panel
- A justified choice of rider segment and building context, with the pain points specific to making that trip without sight
- Solutions that go beyond tactile labels, prioritized by impact, cost and whether they can be retrofitted
- Effects on sighted riders and the building: noise, waiting time, privacy and maintenance
- Success metrics based on unaided, correct trips, and how they would be measured with blind testers
### Follow-up Questions
- How would your design work in a building with destination dispatch, where riders enter their floor at a lobby kiosk and are assigned a car?
- What changes for a rider who is both deaf and blind?
- Spoken announcements tell everyone nearby which floor a rider is going to. When does that matter, and how would you handle it?
Overview: A product design prompt asking a PM candidate to design an elevator experience for people who are blind. It tests mapping the full trip without sight, choosing a rider segment and building context, prioritizing solutions that can be retrofitted, weighing effects on other riders, and defining success metrics.