I have recently done my first ever market sizing case study interview (not MBB, second tier). As I don't know how good is good enough, I'd appreciate your opinions on how you think I fared, based on the following:
- I set out a clear, logical and typical approach: take population, segment by age, ascertain # of consumers and consumption per head => mkt volume, estimate unit value => get mkt value.
- I performed some tricky mental calculations quickly and accurately (e.g. translate 2/80 to a percentage - not rocket science, but we all know the tricks nerves can play).
However, I had a couple of hiccups. I made one silly calculation error (2.5% of 50 - I know, primary school stuff), but as soon as I heard the words, "are you sure?" I rectified and corrected.
Also, I proposed an estimation of a manufacturer's revenue based on retail price. But again, once I saw the raised eyebrow of my interviewer, I realised I forgot to take out distrib/retail margin, rectified and corrected.
So how did I do? How serious are this hiccups, considering the rest was ok?