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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
4.4
90.3k times solved
Difficulty: Beginner
Interviewer-led
Growth strategy
Profitability analysis
You have been hired to support the owner of a bike-shop as a business consultant. The bike-shop has suffered a sign(...)
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(...)
Expert case by
FastFood Chain Turnaround
5.0
1.2k times solved
Difficulty: Beginner
Candidate-led
Profitability analysis
Our client (FastFood Co) is a fast-food company that has > 20 restaurants in the city. Recently, the business has enc(...)
Our client (FastFood Co) is a fast-food company that has > 20 restaurants in the city. Recently, the business has encountered significant challenge(...)
Company case by
Oliver Wyman
Oliver Wyman Case: Setting up a Wine Cellar
4.1
117.7k times solved
Difficulty: Beginner
Candidate-led
Profitability analysis
I’m thinking about setting up a wine cellar in my basement. The way I see it, shelf space would be divided into two sect(...)
I’m thinking about setting up a wine cellar in my basement. The way I see it, shelf space would be divided into two sections: (1) a “drinking” section(...)

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!

Company case by
Bain & Company
Bain Case: BeautyCo – Where Did the Profits Go?
4.5
57.0k times solved
Difficulty: Intermediate
Candidate-led
Market analysis
Profitability analysis
Our client BeautyCo is a large European perfumery company with 500 shops across Europe. However, BeautyCo has been strug(...)
Our client BeautyCo is a large European perfumery company with 500 shops across Europe. However, BeautyCo has been struggling with a decrease in profi(...)
Case by
PrepLounge
Diagnosis: Acquisition ache
4.4
13.0k times solved
Difficulty: Advanced
Candidate-led
Growth strategy
Market analysis
New product
Organizational behavior
Public sector
Your client is part of AtoZ Ltd., a diversified multinational company with a health care division that produces medical(...)
Your client is part of AtoZ Ltd., a diversified multinational company with a health care division that produces medical instruments and related servic(...)
Case by
PrepLounge
FibOp fibers
4.3
12.7k times solved
Difficulty: Intermediate
Candidate-led
Market analysis
Operations strategy
Profitability analysis
The new CEO of an optical fiber manufacturer, called FibOp, has come to you complaining that their revenues went down by(...)
The new CEO of an optical fiber manufacturer, called FibOp, has come to you complaining that their revenues went down by 40% this year compared to las(...)
Company case by
Oliver Wyman
Oliver Wyman Case: Full Electrons Ahead
4.4
136.5k times solved
Difficulty: Intermediate
Candidate-led
Growth strategy
Market analysis
Market sizing
Operations strategy
Your client, large automotive OEM WyCar, has developed its first fully electric vehicle (EV) and introduced it as a pilo(...)
Your client, large automotive OEM WyCar, has developed its first fully electric vehicle (EV) and introduced it as a pilot on the Austrian market last(...)
Case by
PrepLounge
Fysikum
4.4
33.2k times solved
Difficulty: Intermediate
Interviewer-led
Market entry
Pricing
Your client, Fysikum, is an operator of squash centres in Sweden. The squash centres include sauna, spa, pool, gym(...)
Your client, Fysikum, is an operator of squash centres in Sweden. The squash centres include sauna, spa, pool, gym and of course the squash court(...)
Expert case by
New
McKinsey Unconventional Case: Inclusive Cafes
0.0
100+ times solved
Difficulty: Intermediate
Interviewer-led
Non-conventional
Your client is a leading retail coffee chain. They are present in several countries globally and are a popular brand in(...)
Your client is a leading retail coffee chain. They are present in several countries globally and are a popular brand in most of the markets that they(...)
Company case by
Berg Lund & Company
Berg Lund & Company Case: Value Growth Strategy - Northern Retail Bank
4.9
3.9k times solved
Difficulty: Intermediate
Interviewer-led
Operations strategy
Restructuring
Du befindest Dich derzeit in einem strategischen Projekteinsatz bei der Northern Retail Bank (NRB), die vor drei Jahren(...)
Du befindest Dich derzeit in einem strategischen Projekteinsatz bei der Northern Retail Bank (NRB), die vor drei Jahren von einem Finanzinvestor übern(...)
Case by
PrepLounge
Derivatives & Hedging – Interview Questions for Finance
5.0
< 100 times solved
Difficulty: Advanced
Interviewer-led
Mergers & Acquisition
This question set explores how companies use forwards, swaps, and options in practice to manage risk. You’ll cover theor(...)
This question set explores how companies use forwards, swaps, and options in practice to manage risk. You’ll cover theory, applications, and calculati(...)
Expert case by
Case with a twist: Chinese Alloy Wheels – US Market Entry
4.3
5.4k times solved
Difficulty: Intermediate
Candidate-led
Capacity change
Market entry
Market sizing
Our client is an alloy wheels manufacturer based in China. The client is contemplating entering the US market. At this p(...)
Our client is an alloy wheels manufacturer based in China. The client is contemplating entering the US market. At this point of time, the client sells(...)
Case by
PrepLounge
Nearshoring - Opportunity study and Business case
4.2
2.9k times solved
Difficulty: Intermediate
Candidate-led
Operations strategy
Profitability analysis
Your client is an international Corporate & Investment Bank (CIB). It is France based and has already expanded to Po(...)
Your client is an international Corporate & Investment Bank (CIB). It is France based and has already expanded to Poland (Warsaw), Asia and Americ(...)
Case by
PrepLounge
Barb's BBQ Booth
4.5
13.5k times solved
Difficulty: Beginner
Candidate-led
Market analysis
Profitability analysis
One day you are grocery shopping when you are approached by Barb B. Queue, the owner of the supermarket’s deli shop. Fac(...)
One day you are grocery shopping when you are approached by Barb B. Queue, the owner of the supermarket’s deli shop. Facing serious competition from o(...)
Expert case by
Paper Product Overseas Growth
4.0
400+ times solved
Difficulty: Advanced
Candidate-led
Growth strategy
Operations strategy
The client is an Indonesian producer of paper boards which can be further processed into paper boxes, shopping bags, etc(...)
The client is an Indonesian producer of paper boards which can be further processed into paper boxes, shopping bags, etc. They sell in both their dome(...)
Company case by
Roland Berger
Roland Berger Case: Onlinestar
4.2
110.4k times solved
Difficulty: Intermediate
Candidate-led
Growth strategy
Market analysis
Profitability analysis
Onlinestar, an online retailer of furniture and garden products (core business), has grown significantly in recent years(...)
Onlinestar, an online retailer of furniture and garden products (core business), has grown significantly in recent years as a result of an expansion o(...)
Expert case by
Updated
MBB Unconventional Case: Coral Reefs
5.0
< 100 times solved
Difficulty: Advanced
Candidate-led
Non-conventional
Public sector
Your client is the Government of Indonesia, specifically a joint committee formed between a few key ministries including(...)
Your client is the Government of Indonesia, specifically a joint committee formed between a few key ministries including the Ministry of Marine Affair(...)
Expert case by
Opportunity Assessment: Alternative Revenue Streams for a Salt Mine
0.0
600+ times solved
Difficulty: Intermediate
Candidate-led
Market analysis
Market entry
Market sizing
Sustainability
Salty Boy Inc. is an underground salt mine in Texas whose new leadership are supporters of the circular economy. Circula(...)
Salty Boy Inc. is an underground salt mine in Texas whose new leadership are supporters of the circular economy. Circular economy provides a pathway t(...)
Case by
PrepLounge
VISO
4.0
13.0k times solved
Difficulty: Beginner
Interviewer-led
Competitive response
Pricing
Your client is a big bank that issues credit cards with a €100 annual fee. Recently, a supermarket entered the credit ca(...)
Your client is a big bank that issues credit cards with a €100 annual fee. Recently, a supermarket entered the credit card business. The supermarket’s(...)
Case by
PrepLounge
Canada Bus Operator
3.8
5.6k times solved
Difficulty: Beginner
Candidate-led
Operations strategy
Profitability analysis
We are a Canada bus transport service operating between major cities. We have been losing money for the past 5 year(...)
We are a Canada bus transport service operating between major cities. We have been losing money for the past 5 years. Our new CEO thinks that we(...)
Company case by
Roland Berger
Roland Berger Case: Sensorio Hightech GmbH
3.3
21.0k times solved
Difficulty: Intermediate
Candidate-led
Market analysis
Market entry
Sensorio Hightech GmbH is a leading manufacturer of technically advanced consumer electronics sensors based in Germany w(...)
Sensorio Hightech GmbH is a leading manufacturer of technically advanced consumer electronics sensors based in Germany with EUR 500 m in revenues. It(...)
Case by
PrepLounge
Telephony Technology Warehouser
4.1
4.8k times solved
Difficulty: Intermediate
Candidate-led
Market analysis
Profitability analysis
We are a warehouser (B2B) and have been facing a decline in profits since past 2 years. We would like you to figure out(...)
We are a warehouser (B2B) and have been facing a decline in profits since past 2 years. We would like you to figure out why this is happening and prov(...)

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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