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Case Interview Frameworks for Every Case Type: The Framework Library

One whole-business tree, tailored for eight case types and hybrids, each with what the client is deciding, the branches kept, where to start and the question the case turns on.

The whole tree, with every option on it.

The business
Market
Demand
Supply
External
Existing businessRevenue
Product 1
Price
Quantity
Product 2
Service 1
Mix
  • Share of revenue from each
Existing businessCost
Variable
Product 1
Product 2
Service 1
Fixed
New business
Ways inwhat each costs up front
Build
Buy (M&A)
Partner
Projected revenue
Projected cost
Operations and risks
The business

This page is the full index behind Level 2, Frameworks: the whole tree once, then the branches that light up for each case type and for hybrids.

Use it to check a framework, never to recite one: the keep-or-cut test still decides what survives for this client.

Profitability: why did profit fall, and how do we fix it?

The business
Market
Not used in this case
Existing businessRevenue
Product 1
Price
  • List price
  • Discounts and promotions
  • Mix across tiers or sizes
  • Price against competitors
  • What customers are willing to pay
Quantity
  • Number of customers: market size x your share
  • Purchases per customer: how often they buy
  • Units per purchase
  • Customers kept versus lost
  • Capacity: how many you can actually serve
Product 2
Service 1
For a service, units are visits, hours or members
Mix
  • Share of revenue from each
Existing businessCost
Variable
Product 1
  • Materials or inputs per unit
  • Labor per unit
  • Delivery
  • Payment fees
Product 2
Service 1
Fixed
  • Rent
  • Salaried staff
  • Marketing and overhead
New business
Not used in this case
Operations and risks
Not used in this case
The business
  • 1MarketNot used
  • 4New businessNot used
  • 5Operations and risksNot used

Deciding: why profit fell (or sits below target), and what to do about it.

Kept: revenue by product (price, quantity, mix) · cost (variable per unit, the fixed lines) · the market as one check.

Start: where the change is; usually revenue.

Turns on: industry problem or company problem? Operations is where the fix comes from, not a branch.

Example: a chain of twelve laundromats with two years of falling profit.

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