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Google·Product Manager·Onsite - Product Sense / Strategy·Intermediate

Intermediate
Apr 2026

Summary

Got a market sizing question from Google that sounds deceptively simple until you actually try to answer it. No idea what role this was for exactly but it felt like a product or strategy screen.

Questions Asked (1)

Q1

You're starting a company to sell face masks. How many should you make for your initial production run?

Product StrategyProduct Analytics & MetricsAdaptability & Ambiguity
Author's notes

I jumped straight into TAM math and kind of forgot to ask any clarifying questions first, which I think hurt me.

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AI HintsAI Generated

Suggested Approach

Start by clarifying the goal of the initial production run (e.g., learning vs. profit) and the target market. Then, estimate demand using a bottom-up approach, factoring in market size, competition, and production constraints. Finally, recommend a quantity that balances risk and learning, and outline how you would iterate based on initial sales data.

Pro tip: Emphasize that the initial run is a learning opportunity: propose a small batch to test the market, gather data, and iterate, rather than aiming for perfect demand forecasting. This shows product sense and adaptability.

1. Clarify Objective and Assumptions

Ask clarifying questions to understand the goal of the initial run (e.g., test market, generate revenue, build brand) and key assumptions (target market, price point, distribution channels).

2. Estimate Market Demand

Use a bottom-up approach: estimate the total addressable market (TAM) for face masks, then narrow to a serviceable obtainable market (SOM) based on your target segment and go-to-market strategy.

3. Factor in Production Constraints

Consider minimum order quantities (MOQs), lead times, costs, and cash flow limitations that may dictate the minimum or maximum production volume.

4. Determine Optimal Batch Size

Balance demand estimates with production constraints to propose a specific quantity, such as a few thousand units, that minimizes risk while providing enough data to validate the market.

5. Define Success Metrics and Iteration Plan

Outline how you will measure success (e.g., sell-through rate, customer feedback) and how you will adjust production for subsequent runs based on initial results.

Key Points to Mention

  • Total Addressable Market (TAM) and Serviceable Obtainable Market (SOM) estimation
  • Minimum Order Quantity (MOQ) and production lead times
  • Cash flow and inventory risk management
  • Learning mindset: initial run as a market test
  • Competitive landscape and differentiation
  • Scalability and iteration based on data

AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.