Product Design: A Microgravity Coffee Machine for Space Station Crews
Company: Google
Role: Product Manager
Category: Product Design & Strategy
Difficulty: medium
Interview Round: Other
You are a product manager asked to design a coffee maker for crew members living aboard the International Space Station. Explain who the product serves, which conditions of life in orbit shape the design, how the device would prepare and serve coffee, what you would build first, and how you would decide whether it succeeded.
```hint Start from what gravity does for you
On Earth, gravity quietly handles several steps of brewing and drinking coffee. List those steps and ask which would fail in orbit; that is where the real design work lies.
```
### Clarifying Questions
- Who is the customer: the astronauts who drink the coffee, the space agency that pays for, certifies and launches the hardware, or both?
- Must coffee be brewed on board from grounds, or may the product start from prepared coffee that only needs water?
- What limits should the design respect for power, water use, mass, stowage space and crew time per cup?
- Is this a short demonstration, or equipment the crew will use every day for years?
### What a Strong Answer Covers
- The users and stakeholders (crew, mission operations, safety and certification engineers, logistics) and a clear goal for the product.
- The conditions that make orbit different, such as how liquids, heat and bubbles behave without gravity, and the limits on safety, water, power, mass, waste and cleaning.
- A concrete design for preparing, serving and drinking coffee, with each choice tied to one of those conditions.
- A prioritized first version and later improvements, with success metrics and guardrails.
- Risks, failure modes, trade-offs and how the device is tested before it flies.
### Follow-up Questions
- Mission control cuts the power and water you may use each day. Which features do you give up first?
- How would you let crew members personalize strength, milk and sugar without bringing loose ingredients into the cabin?
- How would the design change for a long mission to Mars, where nothing can be resupplied during the trip?
Overview: A product design interview question asking how to build a coffee maker for astronauts aboard the International Space Station. It tests identifying users and stakeholders, reasoning about microgravity, safety, water and power limits, and turning those constraints into a prioritized design with success metrics.