A case interview presents a business problem and asks you to work toward a recommendation with the interviewer. It is the core format in management consulting and appears in strategy, product and operations hiring. You clarify the objective, structure the problem, ask for data, run the math, then state a recommendation.
What Case Interview means in practice
A case runs twenty-five to forty minutes and is usually delivered by a consultant one or two levels above the role. Formats vary: interviewer led cases pass you discrete questions, while candidate led cases expect you to drive. A typical case includes a market sizing or profitability question, a chart or table to interpret, some quick arithmetic and a synthesis at the end. Firms score structure, quantitative accuracy, business judgment and communication separately. Written cases and group cases exist too, and final rounds often include a case delivered by a partner who pushes back hard.
Why it matters for candidates
The case is the whole assessment in consulting, and structure carries most of the weight. Interviewers can tell within two minutes whether your framework was built for this problem or memorized from a book. Arithmetic errors are survivable if you state your assumptions and sanity check the result; an unstructured ramble is not. Getting comfortable saying 'let me take thirty seconds to structure this' is worth more than any framework you could recite.
How to prepare
- Practice live with a partner, not just by reading case books.
- Build your structure from the specific question rather than a stock framework.
- Drill mental math: percentages, ratios, large number multiplication.
- Say your assumptions aloud and check whether each result is plausible.
- Lead with the recommendation, then give the supporting reasons.
Example
A regional grocery chain's profits fell fifteen percent while revenue held flat. The candidate asks for the time frame and whether it is one region or all of them, then splits profit into revenue and costs, and costs into fixed and variable. The data shows shrink and labor rising in one region. After a quick estimate of the impact, they recommend a targeted stocktaking and scheduling fix there, and name the risk of cutting staff too far.
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