Rethinking the Curbside Fire Hydrant Used on US Streets
Company: Google
Role: Product Manager
Category: Product Design & Strategy
Difficulty: medium
Interview Round: Other
Take the ordinary fire hydrant and design a better version of it. Assume the common type found on streets across the United States. Treat it as a product: decide what the redesign should achieve and for whom, identify the problems worth solving, propose and prioritize changes, and explain how you would know the redesign worked.
```hint Follow one fire call
List everyone who deals with a hydrant over its life, then trace a single fire call from dispatch to the moment water flows and mark where minutes are lost or things go wrong.
```
### Clarifying Questions
- Is the main goal getting water on a fire faster, keeping hydrants working at lower cost, or reducing problems for the public such as illegal opening, vehicle strikes and blocked access?
- Is the redesign limited to the unit above ground, or can it include the valve below ground and the connection to the water main?
- Must it work with the hose couplings and hydrant wrenches fire departments already carry, including crews from neighboring towns who arrive to help?
- Are we designing new hydrants only, or also changes that can be fitted to hydrants already in the ground?
### What a Strong Answer Covers
- A goal for the redesign, tied to what the current hydrant does poorly
- The people who interact with a hydrant, with one chosen as the focus and the reason for the choice
- That user's journey and pain points, ranked by how much they cost
- Solutions compared on impact, cost, compatibility with existing equipment and how they reach hydrants already installed, ending in a clear pick
- Success metrics, a pilot plan, and the risks of changing public-safety infrastructure that sits outdoors for decades
### Follow-up Questions
- Hydrants stay in service for decades. How would you get your improvement onto existing hydrants, and how would you pilot it before a citywide rollout?
- How would you keep your changes from making it easier for residents to open hydrants without permission?
- If your redesign raises the cost of each hydrant, how would you make the case to the city's water utility and fire department?
Overview: A product sense exercise that asks you to redesign the ordinary street fire hydrant used across the United States. It tests whether you can set a goal, pick a primary user among firefighters, utility crews and the public, find the pain points in a real-world journey, and prioritize changes with success metrics and risks.