Break the problem into a demand-driven estimation: start with global population, estimate average chicken consumption per person per year, and convert that to the number of chickens needed at any given time using the chicken's lifecycle. Alternatively, use a supply-side approach by estimating major producers and their output. Clearly state assumptions and show your reasoning.
Pro tip: Don't aim for the exact number; the interviewer cares about your structured thinking and ability to make reasonable assumptions. Sanity-check your final estimate against known facts (e.g., global poultry meat production) to show business acumen.
Ask whether they mean chickens alive at a single point in time or total over a period (e.g., annually). Also clarify if they include all types (broilers, layers, etc.).
Decide between demand-side (consumption-based) or supply-side (production-based). For a product manager, demand-side often resonates because it ties to user needs.
Start with global population (~8 billion). Estimate average chicken meals per person per week, convert to annual consumption, then to number of chickens using average meat per chicken.
Chickens are not stored; they are bred and slaughtered continuously. Estimate the average lifespan of a meat chicken (~6-8 weeks) to determine how many must be alive at any moment to meet annual demand.
Compare your estimate to known data (e.g., global poultry meat production ~130 million tonnes). Adjust assumptions if needed and present a final range.
AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.