🔍 Analysis tools

Market sizing (guesstimates)

Estimate a big number from small, sensible assumptions.

Pick an approach — top-down (population → share → spend) or bottom-up (stores × customers × spend) — and state every assumption out loud.

Interviewers grade the logic, not whether you hit the exact number.

How to break it down

Market size

Population

× % who buy

× units per year

× price

🧮 Example

Cups of chai sold daily in Bengaluru: 1.3 crore people × 30% buy chai outside × 1.5 cups ≈ 58 lakh cups a day.

🎯 Interview tip

Round numbers aggressively and sanity-check the answer against something you know.

Used in

Learn next

TAM, SAM, SOM

Total market, the part you can serve, the part you can realistically win.

Market share

Your slice of the total market.

Driver tree

A maths version of an issue tree.

The Case Flex weekly

One concept. One case breakdown. One practice prompt. Every week, in simple words.

An AI interviewer runs you through a case, pushes back, and scores your reasoning. Free to start.