Knowledge
How to solve each kind of case, and what every word means.
Choose a case type to learn its structure, or explore a tool for a specific branch of the problem. Each guide includes examples and mistakes to watch for.
Case types
- Profitability
Profit has fallen and the cause is not stated. Decompose it, isolate the driver, then say what to do about it.
- Market Entry
Should the client enter this market, and if so how. Attractiveness, competition, entry mode, and whether the numbers clear the bar.
- Market Sizing
Estimate a number nobody has. Pick a path, state assumptions the interviewer can check, and sanity-check the answer.
- Pricing
Set or change a price. Cost gives the floor, competition the reference, and value to the customer the ceiling.
- Growth Strategy
Revenue has to grow. Existing products or new, existing customers or new, and what the client can actually execute.
- Cost Reduction
Take cost out without taking the business with it. Find the large, addressable lines and leave the ones that carry revenue.
- Operations
Something in the process is the constraint. Find the bottleneck, because improving anything else changes nothing.
- Investment and M&A
Buy, build, partner, or walk away. Value, synergies that survive contact with reality, and what the downside costs.
- Portfolio Strategy
Compare business units by market attractiveness, competitive position and capital needs. Decide where to invest, hold or exit using explicit assumptions.
- Public and Social Sector
The objective is not profit. Beneficiaries, outcomes per rupee, and constraints a company would never face.
- Unconventional
Brain teasers and cases with no standard structure. Structure still wins; the structure just has to be built on the spot.
Structures and tools
- Internal / External
Diagnose a performance decline by separating internal and external causes. Compare evidence, rule out weak explanations and focus the next question.
- Price / Volume / Mix
Explain a revenue change through price, volume and product mix. Build a numerical bridge with consistent units and reconcile it to the total.
- Split by Segment
Find which customer segment explains a change in performance. Reconcile weighted totals, test mix effects and avoid counting the same sale twice.
- Supply / Demand
Explain a price change or shortage by separating supply and demand. Test shifts with evidence before recommending a response to the constraint.
- Before / During / After
Map an experience before, during and after an event. Locate customer pain points, choose meaningful metrics and prioritise improvements.
- Qualitative / Quantitative
Combine financial thresholds with customer, brand and execution risks. Build a balanced yes-or-no recommendation instead of relying on numbers alone.
- Short Term / Long Term
Turn a recommendation into immediate and longer-term actions. Assign owners, metrics and dependencies, and distinguish stabilisation from structural repair.
- Stakeholders
Map who is affected by a business decision. Compare incentives, resistance and trade-offs, then plan the actions needed for a workable transition.
- Risk Types
Identify financial, operational, regulatory and reputational risks. Rank exposure, assign mitigation and monitor early warnings in a case recommendation.
- 4Ps
Diagnose falling sales through product, price, place and promotion. Use the 4Ps to choose the next question and test the most likely cause.
- Porter's Five Forces
Assess industry attractiveness with Porter's Five Forces. Connect rivalry, entry, substitutes and bargaining power to margins and strategy.
- Value Chain Analysis
Trace a cost or quality problem through the business's activities. Use value chain analysis to locate losses and test a focused improvement.
- Build / Partner / Buy
Compare building, partnering and buying when a client needs a capability. Weigh time, cost, control and risk before recommending an approach.
- PESTEL
Test how political, economic, social, technological, environmental and legal factors affect a market entry or investment decision.
- Ansoff Matrix
Compare growth through existing or new products and markets. Use the Ansoff Matrix to organise options, test assumptions and weigh execution risk.
- 3Cs
Use company, customer and competitor questions to understand an unfamiliar case. Identify the key uncertainty and choose a focused structure.
Where the ideas come from
These guides adapt business concepts into interview practice. The diagrams and illustrative cases are starting points for reasoning, not scripts to memorise.
- Harvard Business School: the Five Forces: Porter's framework explains how industry structure influences competition and profitability.
- OpenStax: the marketing mix and the 4Ps: Defines product, price, place and promotion as distinct marketing decisions.