Whenever you're ready, walk me through how you'd approach this.
Tell me how you would approach a market sizing case for a new opportunity, including the calculations and assumptions you would use.
Explain how you would clarify the scope, choose a top-down or bottom-up approach, calculate the addressable market, test the reasonableness of your assumptions, and communicate uncertainty. Be prepared to distinguish TAM, SAM, and SOM where relevant, and to explain how you would validate the estimate with external data.