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Market sizing exercising

Hi guys,

I would love to exercise market sizing on a daily basis and I know I can do it just by trying to estimate random stuff in the world, but then I wouldn't be able to see the solution afterwards.

Do you know where I can find some good market sizing questions with approached explained?

Thanks

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Top answer
on Oct 22, 2019
McKinsey | NASA | top 10 FT MBA professor for consulting interviews | 6+ years of coaching

Hi,

also here in the forum, you can find some real cases (you could look for the hashtag "Market sizing").
2 examples:

https://www.preplounge.com/en/consulting-forum/how-much-would-you-charge-to-clean-all-the-windows-in-seattle-4965

https://www.preplounge.com/en/consulting-forum/market-sizing-milk-consumption-5087

Best,

Antonello

Vlad
Coach
on Oct 22, 2019
McKinsey / Accenture Alum / Got all BIG3 offers / Harvard Business School

Hi,

Any casebook has market sizing cases with the solutions. Unlike the regular cases solutions, MS solutions are pretty good

Best

Ian
Coach
on Dec 31, 2021
Top US BCG / MBB Coach - 5,000 sessions |Tech, Platinion, Big 4 | 9/9 personal interviews passed | 95% candidate success

Hi there,

Providing some market sizing thinking for anyone revisiting this Q&A:

Remember that there's rarely a "best" answer with market sizing. What's important is that you break down the problem the way it makes sense to you. Importantly, break it down so that the assumptions you make are the ones you're most comfortable in.

For example, do you know all the major brands? Great go with that. Do you understand all the segments of that country's population (either age or wealth or job breakdown)? Go with that. Do you know the total market size of the tourism (or hotel) industry? Then break it down that way.

Some tips:

  1. Just like in a case, make sure you understand the question - what are you really being asked to calculate
  2. Decide whether a top-down or bottom-up approach is best
  3. Figure out what you know you know, and what you know you don't know, but could estimate
    1. This helps you determine how to split out buckets
  4. Stay flexible - you can start with a "high-level" market sizing, but gauge your interviewers reaction....if it looks like they want you to do more...then go along level deeper in terms of your splits
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