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@openlatecookie6381 hour agoHong Kong SAR China
Should I state all my market-sizing assumptions upfront, or introduce them only when I need them?
- Market Sizing
When I do market sizing, I sometimes spend a long time listing every assumption before calculating anything. Other people seem to introduce assumptions step by step. Which approach is clearer in an interview?
Similar Questions
In market sizing, should I replace a rough assumption with a real number I happen to know?
- Market Sizing
Sometimes a market sizing case asks me to estimate something like population or household size, but I actually know the real number. Should I use it, or is the interviewer expecting me to make an assumption and show the logic?
Oct 6, 2026United States
Top answer
Mayank G.Coach
Mayank G.CoachIf you genuinely know a reasonable real-world number, you can use it. The goal is not to pretend you know less than you do.
Interviewer gave me a starting population number that seems wrong. Should I challenge it?
- Market Sizing
In a market-sizing case, the interviewer gave me a population figure that did not match what I thought was correct. I froze because I did not know whether it was a test or just a simplified assumption. Should you challenge a number the interviewer gives you if you think it is wrong?
Sep 29, 2026United States
Top answerMayank G.Coach
Mayank G.CoachUse the number provided for the case unless there is a clear reason to clarify what it represents.
Should I use households or individuals as the base in a market sizing case?
- Market Sizing
I sometimes get stuck at the first step because I cannot tell whether to size from total population, households, or some other unit. Is there a general rule for choosing the base, or does it depend entirely on what is being bought?
Sep 30, 2026United States
Top answerMayank G.Coach
Mayank G.CoachUse the unit that best matches how the product is purchased or consumed.