The case interview method, tier by tier.

Anatomy of a case

What the casebooks we analysed really contain: 217 cases, seven families, and a recurring grading rubric.

Mental math

Fast, accurate mental math: key reflexes that cover most case interview calculations.

Case finance

The finance you are actually asked for: P&L, break-even, leverage, NPV, IRR, valuation, customer lifetime value.

Orders of magnitude

The orders of magnitude that make your assumptions credible in three seconds.

Estimating a market

Estimating any market: four methods, plug-and-play coefficients, four worked cases.

Profitability

Profitability: the complete tree, the twelve classic causes and how to uncover them using figures.

Growth and entry

Growth, market entry, launch: the same logic in five questions, and recurring calculations.

M&A and funds

Acquisitions, investments, private equity funds: target valuation, synergies, maximum price, IRR.

Pricing

Setting a price: the cost floor, the competitor benchmark, and the customer value ceiling.

Operations and costs

Operations: bottlenecks, capacity, queues, staffing, experience curve. Three formulas are all you need.

Competition and strategy

Competition and strategy: market structure, responding to an entrant, sustainable advantages, useful economics.

22 sectors in numbers

22 sectors in numbers: revenue equations, cost structures, benchmarks, and case pitfalls.

Exhibit traps

Reading an exhibit in 60 seconds: the eight traps real casebooks set on purpose.

Idea bank

Idea bank: thirteen recurring brainstorming questions, already organised by category.

Synthesis

Synthesising: answer first, three data-backed reasons, risks, next steps.

Six express cases

Six express cases, one for each family, to see the patterns come together.