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The Case Interview Format

When applying to top consulting firms, one of the most crucial stages of the interview process is the case interview. This format is designed to assess your analytical competencies, problem-solving skills, and ability to think strategically under pressure. Let's take a look at what to expect.  
 

 

Structure of a Case Interview

A case interview is a 30-minute simulation of a typical business project that consultants may have worked on. Cases provide a real example of an on-the-job experience and the assumption is that if a candidate is successfully able to tackle a case interview, he or she is also more likely to be a successful management consultant.

Case studies are the most important and usually the longest part of consulting interviews. In addition to the case study, the interview typically includes introductory small talk, a personal fit interview, and closing questions (see the illustration below).

The graph shows the process of a case-interview, based on 4 steps.

Many companies review and standardize their consulting cases prior to a real interview to ensure that the case is neither too difficult nor too easy. Companies also ensure that a variety of skills are tested during the interviews.

 

The Typical Flow of a Case Interview

The case interview typically follows a structured flow to ensure that both the interviewer and the candidate cover all necessary aspects of the business problem. It involves the following phases:

1. Case Presentation and Problem Understanding

To start off, the interviewer will present a specific business problem or scenario. This could range from market entry considerations, to profitability issues, or organizational changes. The problem is usually based on real-world business issues that the consulting firm dealt with in the past.

You are expected to listen carefully, take notes, and clarify any points that are not clear to fully understand the scope and context of the problem.

👉 To get a better feeling for possible case prompts, check out the following beginner cases. 

Company case by
DHL Consulting
DHL Consulting case: Bike Shop
You have been hired to support the owner of a bike-shop as a business consultant. The bike-shop has suffered a significant revenue decline during the last year, and now the owner would like you to assess the situation and options for the way forward.They want to know last year’s profit, i.e. how it was affected by the revenue decline, and what the priority actions are to survive the next year. (short term)In addition they would like to understand the strategic competitive position of the shop better and how to increase revenues again mid- to long-term.
91.0k times solved
Difficulty: Beginner
Interviewer-led
Growth strategy
Profitability analysis
Expert case by
Emily
FastFood Chain Turnaround
Our client (FastFood Co) is a fast-food company that has > 20 restaurants in the city. Recently, the business has encountered significant challenges, with net profit drops to negative.The client wants us to help them turn around the business. How would you help them?
1.3k times solved
Difficulty: Beginner
Candidate-led
Profitability analysis

2. Framework Development

Afterwards, you outline a structured approach or framework to tackle the problem. Common frameworks include the SWOT analysis, Porter’s Five Forces, or the 4P's, with which you can structure your information. This step demonstrates your ability to break down complex issues into manageable parts.

However, keep in mind that it is not enough to simply memorize the standard framework concepts. While standard frameworks are useful for a rudimentary outline of a case problem, they need to be optimized and adapted to the individual case. Don't worry, as this is a skill you can develop, but it definitely requires thorough preparation and practice

Once you have crafted your structure, clearly explain your framework to the interviewer, ensuring he or she understands your thought process and logical flow.

3. Analysis and Problem Solving

Next, you dive into the analysis. During the interview, your interviewer may provide additional data, charts or exhibits. Analyze this information to support your framework and build your argument. Formulate hypotheses based on your analysis and test them against the data provided. If needed, adjust your approach based on your new findings.

During the quantitative analysis, perform the necessary calculations to support your findings. This could include market sizing estimations, profitability calculations or a cost analysis. Good mental math skills will definitely help in this phase. 

4. Recommendations

Once you have worked through your structure, provide clear, and actionable recommendations based on your analysis. Use the Pyramid Principle of communication, highlight your key findings and explain how they address the problem.

You should also be ready to justify your suggestions with evidence from your analysis (i. e. data) and discuss possible next steps or further areas of investigation that the client may wish to consider.

After all, the interviewer may question your conclusions or ask for further clarification. Be prepared to defend your recommendations and discuss alternative perspectives. 

After, all the best way to prepare for your interview is practice. Explore our Case Library with real examples now!

tkMC Case: Market entry strategy in the lithium materials trade market
Your client tk Commodity Trade (tk ComT) is a global materials trader - they buy and sell raw materials. tk ComT had stable EBITDA margins in recent years. They consider expanding their target market and entering the Lithium (electric vehicle battery grade) trade, due to the current high demand for electric cars and Lithium-ion batteries. The client is concerned about minimizing the cash spending and about improving the payback period for this market-entry campaign, due to corporate cash policy.As a consultant, you are expected to calculate the size of the Lithium market and to assess the payback periods for an organic market entry (with own resources) as well as for the acquisition of an established company. Finally, the client expects a proposal about the best market entry strategy and potential opportunities and risks.
20.9k times solved
Difficulty: Intermediate
Interviewer-led
Market entry
New product
Profitability analysis
Company case by
Oliver Wyman
Oliver Wyman Case: On the Right Track
TrainCo is a manufacturer of rolling stock, or trains, with production sites in three European countries. The company has seen declining profitability over the past years; however, they are currently in a very good position to bid for and win a big contract for regional trains for a Swiss national rail company. They have asked you advise to them on whether they should place a bid for the contract.
87.2k times solved
Difficulty: Beginner
Candidate-led
Operations strategy
Profitability analysis
Company case by
Berg Lund & Company
Berg Lund & Company Case: Value Growth Strategy - Northern Retail Bank
Du befindest Dich derzeit in einem strategischen Projekteinsatz bei der Northern Retail Bank (NRB), die vor drei Jahren von einem Finanzinvestor übernommen wurde. Während des Mittagessens lädt Dich der CEO zu einem Espresso in sein Büro ein. Dort erläutert er, dass der Finanzinvestor bestrebt ist, den Unternehmenswert der Bank zu steigern – möglicherweise für einen künftigen Verkauf oder Börsengang, weitere Details stehen zum jetzigen Zeitpunkt noch nicht fest. Gemeinsam mit Deinem Projektteam sollst Du nun Maßnahmen entwickeln, um die Profitabilität der Bank zu verbessern. Angesichts der Ergebnisse des letzten Geschäftsjahres und des intensiven Wettbewerbsdrucks sieht der CEO hier dringenden Handlungsbedarf.Der CEO bittet Dich darum, in 30–45 Minuten in sein Büro zurückzukommen, um Deine fachkundige Einschätzung für erste konkrete Stellhebel zu diskutieren.
4.1k times solved
Difficulty: Intermediate
Interviewer-led
Operations strategy
Restructuring
Company case by
H&Z
H&Z Case: Coffee Place
In einem Unternehmen mit 1.400 Mitarbeitern soll es zukünftig einen gemütlich und modern eingerichteten Coffee Place geben, der von den Mitarbeitern vor und nach dem Mittagessen genutzt werden kann, um sich noch etwas mit den Kollegen auszutauschen. Der Coffee Place wird eine Größe von ca. 80 qm haben, ist mit Tischen, Stühlen sowie Stehtischen ausgestattet und befindet sich direkt im Anschluss an die betriebseigene Kantine. Zwei Mitarbeiter werden in dem Coffee Place beschäftigt und schenken mit zwei großen Profi-Siebträger-Kaffeemaschinen den Kaffee hinter dem Tresen aus. Der Preis pro Tasse wird für alle gängigen Varianten 0,80 € betragen. Es wird normaler Kaffee, Cappuccino sowie Espresso angeboten. Neben den Kantinenbesuchern hat der Coffee Place keine weiteren Gäste. Die Öffnungszeiten des Coffee Places werden an die Öffnungszeiten der Kantine von 11:30 bis 14:00 Uhr angepasst.Die Geschäftsführung bittet Sie um eine Einschätzung der zukünftigen Profitabilität des Coffee Places als stand-alone Lösung, direkt im Anschluss an die Kantine.Zusätzlich möchte die Geschäftsführung von Ihnen im Vorfeld erste Ideen zur Optimierung der zukünftigen Rentabilität des Coffee Places erfahren.
15.5k times solved
Difficulty: Intermediate
Candidate-led
Profitability analysis
RSM Ebner Stolz Case: Noch zu retten?
Sie werden vom Management der mittelständischen Packaging-Group gebeten, eine Einschätzung zur wirtschaftlichen Lage des Konzerns abzugeben. Im Rahmen der Analyse der operativen Ergebnisse der Auslandswerke soll das Werk identifiziert werden, bei dem der aktuell größte Handlungsbedarf besteht. Davon ausgehend sollen Optionen erarbeitet und bewertet werden, die der Kandidat dem Management im Umgang mit diesem Auslandswerk empfehlen würde und was ggf. auf Basis der Analyse für Rückschlüsse hinsichtlich der Konzernzahlen gezogen werden können.
12.1k times solved
Difficulty: Intermediate
Interviewer-led
Operations strategy
Profitability analysis
Case by
PrepLounge
Recruitment of Junior Attorneys
We are a reputed law firm. We are thinking of hiring associates right out of college at $120,000 per year. Do you think it is a good idea?
5.7k times solved
Difficulty: Beginner
Candidate-led
Profitability analysis
Expert case by
Benjamin
MBB Unconventional Case: Coral Reefs
Your client is the Government of Indonesia, specifically a joint committee formed between a few key ministries including the Ministry of Marine Affairs & Fisheries, Ministry of Tourism and Ministry of Environment & Forestry. Indonesia is one of the largest developing countries in the world, with a population of about 285M people and an average monthly income of only USD 500. Located in Southeast Asia, Indonesia is actually a vast archipelago comprised of 17,000 islands, giving it one of the longest and most complex coastlines in the world. It is also part of the Coral Triangle, an area demarcated by scientists as the global epicenter of marine diversity. Your client tells you that Indonesia's once pristine coral reefs have seen a rapid decline over the past decade. They have come to you for help and want to figure out what is causing the problem.
200+ times solved
Difficulty: Advanced
Candidate-led
Non-conventional
Public sector
Case by
PrepLounge
Carmatics
Your client, Virgin Mobile, is interested in offering telematics services to vehicles in the USA with a new brand: Carmatics.Should they enter this new market? If yes, how should they do it?
18.6k times solved
Difficulty: Beginner
Candidate-led
Market analysis
Market entry
Market sizing
Case by
PrepLounge
Paper Print
A printing company is planning to take over another printing company with similar technology and printing machines. The candidate is supposed to evaluate the acquisition by answering a line of questions that are presented in the “suggested approach” section.
17.6k times solved
Difficulty: Intermediate
Interviewer-led
Mergers & Acquisition
Expert case by
Benjamin
Revolut Mock Interview: Strategy & Operations
You are part of the Strategy & Operations team at Revolut.Revolut has had significant growth over the past couple of years, with customer base growing 20-30% per year. Our apps have also been highly rated in the various app stores - be it GooglePlay or on the Apple store.Revolut's current customer strategy is to segment customers based on their subscription tiers/plans. Standard: FreePlus: $3.99/mthPremium: $7.99/mthMetal: $14.99/mthUltra: Ultra $55/mthKey differentiation between the plans are in the pricing and features. Namely, the more expensive tiers like Metal and Ultra have additional features such as personalized and premium card design, free access to lifestyle apps (e.g. Financial Times, Class Pass etc), better FX rates and priority customer support.It's great that Revolut has been expanding rapidly, but we are starting to see some stresses on our existing operations and processes. One key area of concern is in customer service, our satisfaction scores have started to trend down and call center headcounts and costs have been increasing in recent years, but we are struggling to handle the load of incoming requests and tickets.You have been tasked to lead a project to solve this problem without ballooning costs. 
300+ times solved
Difficulty: Advanced
Interviewer-led
Operations strategy
Case by
PrepLounge
Gas station
How many gas stations are there in Paris? Suppose a friend of yours wants to open a gas station in Paris. What aspects should he consider?
53.1k times solved
Difficulty: Intermediate
Interviewer-led
Market entry
Market sizing
Case by
PrepLounge
Supermarket turnaround
Our client is a supermarket chain in Britain called Sparx. They have been the market leader for more than 30 years. However 5 years ago they have seen growth stall and 2 years later revenues started shrinking, keeping so until today. The profitability of the chain has followed the revenue downturn trend, but dropped in percentage much more than the revenues.They now hold only 25% market share, with the second player getting dangerously closer with 23%.What’s wrong and how can you help them turn this situation around?
20.8k times solved
Difficulty: Advanced
Candidate-led
Market analysis
Profitability analysis
Expert case by
Benjamin
BCG Beginner Case: Fashion startup
Your client is a D2C (direct to customer) online fashion business in a developing country. It is a new brand, launched about 2 years ago and founded by ex-investment bankers. Their brand focuses on trendy, edgy design that is less main-stream (versus big brands like H&M, Uniqlo, Zara etc) for adult men. While they have been growing fast, they want to understand how they can further improve their sales.
300+ times solved
Difficulty: Beginner
Interviewer-led
Growth strategy
Case by
PrepLounge
GamingHub
Our client, GamingHub, is a large diversified entertainment corporation that received a request to approve a $200 m capital allocation from its video game manufacturing division. The division wants to triple the capacity.The client hired us to help him decide if he should approve this capital request and have asked you what critical issues are to be looked into to decide if the division's market is attractive enough to expand.
11.0k times solved
Difficulty: Intermediate
Candidate-led
Growth strategy
Market analysis
Case by
PrepLounge
Rally racing
Your client is the owner of UBS #42, a rally racing team. There are 36 races in a season. At the end of the season, the driver who has earned the most number of points will win the championship.Jeff Tarin, a well-known driver, races for UBS #42. He began racing in this tournament six years ago and is currently ranked fifth in a field of 40 drivers.The director of marketing at Jazz Sweets recently contacted your client to ask whether your client would like to start a second racing team that Jazz Sweets could sponsor. The director realizes that rally racing is the fastest-growing race sport segment among males aged 18-45. He has already asked a successful driver from a regional conventional racing circuit to be the new team’s first driver. Your client wants to know whether he should go ahead with this opportunity.
9.4k times solved
Difficulty: Beginner
Candidate-led
Market entry
Profitability analysis
Case by
PrepLounge
DCF Analysis at CloudCore Inc.
You’re working on a DCF valuation for CloudCore Inc., a publicly traded cloud computing company. You’ve built a standard unlevered DCF model using a WACC of 10% and based on your 5-year forecast, the Enterprise Value (EV) currently comes out to $200 million.
300+ times solved
Difficulty: Intermediate
Interviewer-led
Valuation
Expert case by
Ben
Pedal Pals' Financial Fitness Challenge: Cost Optimization Consultancy
Pedal Pals is an interactive fitness platform with millions of members, offering connected, technology-enabled fitness classes that utilize its proprietary hardware, the Pedal Pal stationary bicycle. Pedal Pals generates strong recurring revenue from its members, who pay subscription fees to access Pedal Pal's Connected Fitness products. Additionally, they have strong sales of the hardware product. Pedal Pals has an admired brand for high quality and sustainability. Recently the company has been challenged by a large, activist investor. The activist investor is citing the plummeting stock price impacting shareholder returns. The activist has attributed the issue directly to poor cost control throughout Pedal Pals. Pedal Pals CEO has hired your organization to determine how to manage its cost issue.
400+ times solved
Difficulty: Intermediate
Candidate-led
Profitability analysis
Case by
PrepLounge
Love thy neighbour as thyself
Your client, Port-Pouri, is a discount retailer in Portugal having 130 stores spread throughout the country and thereby being the largest player in the market. It is more profitable and has a higher market share than the closest competitor (75 stores). This competitor has recently been bought by SPARnien, the largest discount retailer in Spain, who plans to convert all 75 stores into SPARnests, the infamous stores that made the company so successful in its home turf. The CEO of Port-Pouri is worried and asks for your advice. Should she react, and if so, how?
3.5k times solved
Difficulty: Intermediate
Candidate-led
Competitive response
Market analysis
Case by
PrepLounge
Vorsprung durch Marge
Dein Klient ist der Vorstandsvorsitzende eines großen Automobilkonzerns. Er möchte, dass Du ihm hilfst, die Gewinnmarge seines Unternehmens zu verbessern.
4.5k times solved
Difficulty: Advanced
Interviewer-led
Growth strategy
Profitability analysis

Key Takeaways for Your Case Interview Success

Mastering the case interview is a crucial step in securing a consulting job. To perform well, you need to demonstrate structured thinking, analytical skills, and clear communication while solving a real-world business problem.

The interview typically follows a structured flow, starting with an introduction and resume discussion, followed by the case presentation, where you clarify the problem and outline a logical framework. From there, you analyze data, test hypotheses, and apply quantitative skills to arrive at well-supported recommendations. Finally, you summarize your findings and engage in a discussion to defend your approach.

Success in case interviews comes down to practice. Familiarizing yourself with common frameworks is useful, but true preparation involves adapting them to different cases, improving your problem-solving speed, and refining your communication. By structuring your thoughts clearly, staying flexible in your approach, and confidently presenting your findings, you’ll increase your chances of impressing your interviewer and landing an offer at a top consulting firm. 🚀

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