Practice With Over 200 Cases on Various Topics

Learn the case interview basics, practice with 200+ cases, and benefit from extensive test materials, and interactive self-study tools.
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accilium
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Company case by zeb Consulting
The bank "His Earlship Charles", a domestic retail and private bank is in a difficult situation. Profits have been declining over the past years due to the ongoing low interest rates set by the central bank. Additionally, the bank is suffering from a decreasing number of customers. The board of dire ... The bank "His Earlship Charles", a domestic retail and private bank is in a difficult situation. Profits have been declining over the past years due to the ongoing low interest rates set by ... (Open whole case)
76.6k
Times solved
4.3
4.5k Ratings
Advanced
Difficulty
Company case by Oliver Wyman
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 where I store bottles for my own consumption and (2) an “investment” section where I store bottles that I intend to sell at a profit after they ... 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 where I store bottles for my own consum ... (Open whole case)
110.8k
Times solved
4.1
3.7k Ratings
Beginner
Difficulty
Company case by Oliver Wyman
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 year. However, sales have been far below the expected numbers. The management has engaged you to support them in understanding the reasons and advise ... 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 year. However, sales have been far below ... (Open whole case)
126.0k
Times solved
4.4
6.6k Ratings
Intermediate
Difficulty
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Company case by Oliver Wyman
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 r ... 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 ... (Open whole case)
79.8k
Times solved
4.4
4.6k Ratings
Beginner
Difficulty
Company case by Deloitte
Duraflex is a German footwear company with annual men’s footwear sales of approximately €1 b.They have always relied on the boot market for the majority of their volume. In this market they compete with three other major competitors.In the fall of 2019, Badger – one of Duraflex’s competitiors – laun ... Duraflex is a German footwear company with annual men’s footwear sales of approximately €1 b.They have always relied on the boot market for the majority of their volume. In this market they ... (Open whole case)
94.2k
Times solved
4.4
13.2k Ratings
Intermediate
Difficulty
Expert case by Hagen
RetailBankingCo is a regional, US-based retail bank that is looking to increase its revenues. As a result, the client is considering introducing a commission-based incentive program for its sales force.RetailBankingCo wants to determine the conditions under which implementing the incentive program w ... RetailBankingCo is a regional, US-based retail bank that is looking to increase its revenues. As a result, the client is considering introducing a commission-based incentive program for its ... (Open whole case)
14.4k
Times solved
3.0
< 100 Ratings
Beginner
Difficulty
Expert case by Hagen
GroceryWholesaleCo is a leading international grocery wholesaler that sells, markets, and distributes food products, equipment, and supplies to restaurants, healthcare and educational facilities, lodging establishments, and other customers who prepare meals away from home. Historically, the client w ... GroceryWholesaleCo is a leading international grocery wholesaler that sells, markets, and distributes food products, equipment, and supplies to restaurants, healthcare and educational facili ... (Open whole case)
12.8k
Times solved
0.0
< 100 Ratings
Intermediate
Difficulty
Expert case by Dennis
Salty Boy Inc. is an underground salt mine in Texas whose new leadership are supporters of the circular economy. Circular economy provides a pathway towards more sustainable production and consumption patterns – CE introduces circularity to many areas of production cycles and encourages using renewa ... Salty Boy Inc. is an underground salt mine in Texas whose new leadership are supporters of the circular economy. Circular economy provides a pathway towards more sustainable production and c ... (Open whole case)
300+
Times solved
0.0
< 100 Ratings
Intermediate
Difficulty
Expert case by Dennis
Kadara, a privately-held US retailer active in the Midwest with annual sales of approximately USD 3 bn, is trying to figure out a solution to last-mile home delivery.  The company currently operates out of 100 brick-and-mortar stores selling primarily groceries and home essentials (e.g. paper t ... Kadara, a privately-held US retailer active in the Midwest with annual sales of approximately USD 3 bn, is trying to figure out a solution to last-mile home delivery.  The company curre ... (Open whole case)
800+
Times solved
0.0
< 100 Ratings
Advanced
Difficulty
Expert case by Dennis
A large natural gas field is unexpectedly discovered on the Mediterranean island of Corsica. The gas can be accessed and produced relatively easily and is of good quality. Europe, and especially Germany as the largest gas consumer in the EU, is looking for alternative gas suppliers to reduce its one ... A large natural gas field is unexpectedly discovered on the Mediterranean island of Corsica. The gas can be accessed and produced relatively easily and is of good quality. Europe, and especi ... (Open whole case)
500+
Times solved
2.5
< 100 Ratings
Beginner
Difficulty
Expert case by Francesco
Our client is a large American music company with a 40% market share and $20 billion in revenue. During the last holiday season, the client released fewer new tracks onto music streaming services compared to the year before. We would like you to figure out what could be causing t ... Our client is a large American music company with a 40% market share and $20 billion in revenue. During the last holiday season, the client released fewer new tracks onto musi ... (Open whole case)
6.7k
Times solved
5.0
< 100 Ratings
Intermediate
Difficulty
Expert case by Francesco
Our client today is AirService – a service provider for a number of airlines and airports. Their management recently realized a decrease in profits that is linked to increasing costs.Accordingly, they have engaged our firm to help address this issue. How would you approach this problem? Our client today is AirService – a service provider for a number of airlines and airports. Their management recently realized a decrease in profits that is linked to increasing costs.Accordingly, they have engaged our firm to help address this issue. How would you approach this problem? (Open whole case)
8.4k
Times solved
5.0
< 100 Ratings
Intermediate
Difficulty
Expert case by Dennis
Your client is Alistair, a brew master from the east coast of the United States. He has developed a beer recipe he believes will revolutionize the beer drinking experience in the US. Alistair was able to convince his family and friends to invest in his business idea after letting them taste a sample ... Your client is Alistair, a brew master from the east coast of the United States. He has developed a beer recipe he believes will revolutionize the beer drinking experience in the US. Alistai ... (Open whole case)
800+
Times solved
5.0
< 100 Ratings
Beginner
Difficulty
Expert case by Alberto
Our client is Sierra Springs, a top 3 spring water producer in the U.S. The company owns the entire bottled-water production supply chain, including water sourcing, production of water-based products, bottling and packaging and distribution to retail outlets. Sierra Springs also leads its own brand ... Our client is Sierra Springs, a top 3 spring water producer in the U.S. The company owns the entire bottled-water production supply chain, including water sourcing, production of water-based ... (Open whole case)
1.2k
Times solved
5.0
< 100 Ratings
Intermediate
Difficulty
Expert case by Moritz
CLIENT OBJECTIVEOur client is Convenio, a US based company that operates a number of micro convenience stores and vending machines throughout the country. Convenio is considering the launch of a new product to enable convenience in passenger transportation and is seeking McKinsey’s help to determine ... CLIENT OBJECTIVEOur client is Convenio, a US based company that operates a number of micro convenience stores and vending machines throughout the country. Convenio is considering the launch ... (Open whole case)
1.6k
Times solved
4.3
< 100 Ratings
Intermediate
Difficulty
Expert case by Ian
Estimate the daily revenue of your nearest coffee shop.Clarifying information:You can pick any coffee shop of your choiceWe would like a “typical” day (i.e. weekday)All revenue (all purchases) Estimate the daily revenue of your nearest coffee shop.Clarifying information:You can pick any coffee shop of your choiceWe would like a “typical” day (i.e. weekday)All revenue (all purchases) (Open whole case)
1.9k
Times solved
4.3
< 100 Ratings
Intermediate
Difficulty
Expert case by Ian
Estimate the number of people on the internet at this exact moment in time.Clarifying information:We can assume it is 11am ESTIt is a weekdayOn the internet means on their computer or their phone====================NOTE==========================Please make sure to check the video URL solution to get ... Estimate the number of people on the internet at this exact moment in time.Clarifying information:We can assume it is 11am ESTIt is a weekdayOn the internet means on their computer or their ... (Open whole case)
1.4k
Times solved
3.0
< 100 Ratings
Advanced
Difficulty
Expert case by Ben
Your client is the Knight’s Watch Municipality. Their governor, John Snow, has engaged you, explaining that an evil army composed of White Walkers plans to destroy all of Westeros. He tells you that the Northern Kingdom is the only fortress capable of stopping this force. However, the wall is s ... Your client is the Knight’s Watch Municipality. Their governor, John Snow, has engaged you, explaining that an evil army composed of White Walkers plans to destroy all of Westeros. He tells ... (Open whole case)
500+
Times solved
0.0
< 100 Ratings
Intermediate
Difficulty
Expert case by Ben
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 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 ... (Open whole case)
300+
Times solved
0.0
< 100 Ratings
Intermediate
Difficulty
Expert case by Ben
Your client is Hogwarts University. Their President, Dr. Albus Dumbledore, is concerned with the university’s profitability and needs your help in determining the best course of action. Your client is Hogwarts University. Their President, Dr. Albus Dumbledore, is concerned with the university’s profitability and needs your help in determining the best course of action. (Open whole case)
200+
Times solved
0.0
< 100 Ratings
Intermediate
Difficulty
21 - 40 of 216 results

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What are cases?

Cases, also known as case studies, are business problems that a candidate is presented with during a case interview at a management consultancy. The challenge is to solve it under pressure and in a structured way.

Why are consulting cases so important for your preparation?

Consulting interviews are among the most competitive and difficult job interviews that exist. Interviewers use cases as an indicator to test whether you have what it takes to become a successful consultant. In order to pass, you need to ace the case interview part. And in order to ace the case interview part, you need to be well-prepared. Thus, practicing cases is one of the most important aspects of interview preparation in consulting. During different rounds of interviews you will have to solve cases again and again to prove your structured and analytical thinking as well as your communication skills.

How can I practice cases?

You can practice cases on your own and go through them to get a first feeling for the structure. Afterwards, you should go into a real interview environment and practice cases with other members on the platform. You will find more than 50 mock-interview requests on the Meeting Board every day, which you can easily accept. If there is nothing suitable on the Meeting Board, you can also use the Candidate Listing. Here you can find active members on the platform and send them a direct meeting request. If you want to take your case practice to the next level, we recommend you to schedule coaching sessions with our coaches who have many years of experience in helping candidates receive their dream job offer.

What is the difference between Candidate-led and Interviewer-led?

In an interviewer-led case interview, the interviewer leads through the conversation. This means that the interviewer asks specific questions and also controls the time you have to analyze and answer different questions and therefore the depth of your analysis. In contrast, the candidate-led style (which is more common) is about you taking the initiative as a candidate. The initial problem is given to you by your interviewer. Afterwards, you have the freedom to structure the case according to your ideas and to ask questions proactively in order to find a solution to the problem.

What are real cases?

Real cases in the PrepLounge Case Library are cases that were submitted by management consultancies and have been treated as such within the company. They were made available from the real interview process. In this way, you can gain deep insights into the requirements of the case interview with the respective top consultancies (e.g. Bain & Company, Roland Berger, Deloitte, Oliver Wyman). We have marked these cases with the corresponding company logo.

What are expert cases?

Expert cases were created by our PrepLounge coaches and either contain real problems that the experts have already dealt with in their lives as consultants or cases from actual consulting interviews they took part in. They offer you an optimal preparation through the different subjects, levels of difficulty and styles. And the best thing is: If you have questions about the cases, you can ask them directly to the authors.

What are video case solutions?

Video case solutions are cases in which we provide you with a solution that includes a YouTube video. With this we want to help you to understand case solutions even better.

What does the rating of the cases mean?

Every member has the possibility to rate a case and leave feedback on the case. This gives you the opportunity to call up a ranking and solve the cases that are particularly popular in the community. It also gives us the opportunity to continuously improve our cases in order to provide you with the best possible practice material.

Which are the most interesting cases on PrepLounge?

Which cases are most interesting for you depends on your personal preference and your level of knowledge. If you are just starting with the case interview preparation, beginner cases are probably the most interesting ones for you. You also have the possibility to filter by different categories, such as personal fit, market analysis or brain teaser and many more, in order to address exactly the topics that are most relevant for your application.

Practice Case Interviews - Browse Our Extensive Case Library

Invite other candidates for a meeting to crack the case interactively or solve it on your own. If you like to check your case approach just have a look at the given sample solution.

A Vast Selection of Management Consulting Cases

Our selection of case studies mirror the wide variety in real case interviews. Thus, you can solve challenging problems around market sizing, market-entry, pricing, or operations strategy. Moreover, all provided cases are marked with a level of difficulty and the respective case style. This will allow you to filter for interviewer-led (as used by McKinsey) and candidate-led cases. In addition, some of our corporate partners granted some great original cases that have been used in real interviews. Check them out to get some authentic insights about the real application process of top firms like Bain, Roland Berger, and many more. These cases are clearly indicated by the firm's logo.

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