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.