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How to calculate a market sizing case instinctively and quickly?

Ben asked on Aug 28, 2018
Looking for case partner in all levels to improve my case interview skill regularly. Available in afternoon or night (GMT+7).

For example look at the "Children vaccine" case. There is some point where I feel difficult to calculate instinctively as a consultant, for example to calculate the potential market sizing and the lifespan age. I would like to know the way I could improving and developing my calculation instinct quickly since most of market sizing case really testing our quantitative ability.

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Vlad replied on Aug 28, 2018
McKinsey / Accenture / Got all BIG3 offers / More than 300 real MBB cases / Harvard Business School
Book a coaching with Vlad

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Hi,

As for structuring - I've answered here:

https://www.preplounge.com/en/consulting-forum/how-to-structuring-the-market-sizing-case-2301

For math skills you need to learn:

  • Rounding up and down
  • Learn how to multiply double digit numbers (https://www.youtube.com/watch?v=6ndkkPZYJHo)
  • Learn the division table up to 1/11 (i.e. 5/6 = 83.3)
  • Learn how to work with zeros using powers (e.g.: 4000000 = 4*10ˆ6)

Use math tools (Preplounge, Mimir math for iOS to practice)

Best!

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