Hello!

The core skills being tested are:

• Ability to think on your feet
• Ability to be structured even when not having a proper business cases
• Agility with quick numbers and estimations, which includes:
  • Back of the envelope calculations
  • Having the right "magnitude" of numbers (e.g., don´t skip a zero)
  • Being able to challenge the numbers correctly, leveraging, for instance, benchmarks.

Hence, you need to keep calm and guide your interviewer through your toughts step by step, from the structure to the different calculations.

Essentially is the same than a case, but with higher stress for lack of time to structure and more vague scenarios.

Hope it helps!

Cheers,

Clara

Hello Benjamin,

The only effective way to do it is to breakdown your problem into several sub-problems. The question that you should ask yourself is: "Would I be able to defend this assumption?" If the answer is not, than you should try to breakdown the problem.

Let's do an example: How many icecreams you eat every year?
I guess that you wouldn't know how to defend any kind of assumption here. Hence, the strategy is to divide the problem into smaller ones:

• How many ice creams you eat every week in the summer?
• How many ice creams you eat in Autumn, Spring and Winter compared to summer?(e.g. 1/2)

You can answer these questions doing appropriate estimation that you can defend. Putting together these hypothesis, you can then answer the original question.
Remember that the final number is not important, most of the times the interviewer has no idea of the answer. The most important thing is to be fact based during your resolution and to justify every step.

Feel free to text me if you want to discuss this further,
Luca

Hi, in addition to the solutions proposed by the other coaches in the discussion, I would like to suggest similar cases in the platform to practice with:

• 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
• https://www.preplounge.com/en/consulting-forum/how-would-you-calculate-the-value-of-a-cow-4982
• https://www.preplounge.com/en/consulting-forum/estimate-number-of-traffic-lights-in-a-london-5692

Hope it helps,
Antonello

Hi Benjamin,

there are 4 main approaches for market sizing that help to cover basically all the situations (they are not the Cosentino’s ones, which are just a bad subset of the real ones). Most people forget at least one of them in their prep. Once you know the approaches, you won’t need much prep to master them. Please feel free to PM me for more info.

Best,

Francesco