Hi,

I think your proxy is not ideal since it is based on some assumptions. You assume implicity that a camera is only and exclusively used on one project. Once that project is finished, camera is used for the next one. This does not HAVE to be true - only could be true.

Look below for the general approach on how to tackle market estimations. Key are the different approaches and you investigating those quickly when you take your silent minute figuring out the structure etc. Ask yourself what is really driving the market. The projects? perhaps (see above). Number of TV news channels and number of big studios? perhaps. Cinema revenues, perhaps, but rather no.

1. Think about formula (not just a flimsy approach, literally an algorithm)
   1. How many approaches are there (bottom-up vs. top-down)?
   2. What are the upsides / downsides of each approach? Which one should I choose given the limited time in a case? Explain this to the iviewer.
2. Necessary assumptions / key drivers (no numbers at this point, just in terms of important Proxies by thinking VERY practical). This is why you should ask follow-up questions after the case prompt. Not for the sake of asking but to help you identify Step 1 and 2. If you dont understand the basic business model and how the service / product PRACTICALLY works and is used, I dont see how you can comfortably estimate the market size.
3. Do the Math transparently using clear language. No mumbling. Double-check your numbers before you speak up.
4. Sense-check the result (!) 2 ways mostly work: checking your calculations and scrutinizing your key assumptions. Or using other "proxies", perhaps other bottom-up or top-down approaches brain-stormed before. You need to be able to tell me as an iviewer if you think your result is too high / low at least. Ideally also give me a rough range of the expected result with a rationale.

Hello!

Remember that they are plenty of ways to calculate a market sizing, not only one. Quite honestly, I think yours is a very reasonable approach.

Cheers,

Clara

Hi there,

I think there is quite a gap in your approach in the assumption that professional cameras are only the ones used for movies production. What about advertisings, TV-shows, documentaries, music videos, news etc.? I mean it' a reasonable approach but it doesn't hold..

Try to dicide first-hand if you want to go bottom-up or top-down, maybe that will help you look at the question from another perspective.

Hope it helps!

Cheers,

GB