Hi Alnur,

I would be happy to share my thoughts on it:

• First of all, I would not say this is a case study but rather a brain teaser/market size estimation. Proper case studies are fictional business situations with more complexity. As such, I would also advise you to focus on solving these instead of brain teasers/market size estimations, given they are seldom used.
• Generally speaking, with brain teasers/market size estimations, I would advise you to first understand whether you want to approach the question top-down or bottom-up. Then, you should think of a meaningful granularity of your structure. And then, you should start laying out the structure in the form of a tree. The actual calculation will be done later, together with the interviewer who will verify the assumptions you make.

If you would like a more detailed discussion on how to address your specific situation, please don't hesitate to contact me directly.

Best,

Hagen

Hi Alnur,

I'd probably start with a top-down approach on this question starting with total land area and breaking that down further. But as Cristian suggested, it would be more useful for you to write down your answer and get feedback. 

This helps you to practice, and try and might help you to reflect on where you went right/wrong/different based on the feedback we coaches can give you.

In such questions you can use either top down or bottom up approach. Generally speaking, a good method is to brainstorm on all the factors. For example in this case - Number of farms in the US, % of animal split in farms, sheeps in a herd etc.

You may need to factor alternate scenario. For example - Sheeps not on farms, domesticated animals, sheeps on zoo etc.

Hi Alnur, 

That's a rather funny market sizing question. 

You'll get more out of this exercise if you provide your suggested answer for us to provide feedback on, rather than asking directly for the approach others have. 

Best,
Cristian