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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An Argentinian toy manufacturer has 50% market share in Argentina and is the market leader in South America. However, its international market share is only 5%.Their CEO wants you to brainstorm and structure potential ideas to increase the company’s profit margins and market share. The CEO also want
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An Argentinian toy manufacturer has 50% market share in Argentina and is the market leader in South America. However, its international market share is only 5%.Their CEO wants you to brainst
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(Open whole case)
37.5k
Times solved
Advanced
Difficulty
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Your client, Customlope, is the leader in the US secure envelope manufacturing industry. Banks buy these envelopes for operations such as money deposits and high value transactions.Next year, a new digital technology will reduce the overall number of units sold in the industry by 25%.In the short te
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Your client, Customlope, is the leader in the US secure envelope manufacturing industry. Banks buy these envelopes for operations such as money deposits and high value transactions.Next year
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(Open whole case)
58.9k
Times solved
Beginner
Difficulty
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A bank based in a developing country in Africa has hired us to find out how it can grow its local retail banking business unit.What aspects would you investigate?  
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A bank based in a developing country in Africa has hired us to find out how it can grow its local retail banking business unit.What aspects would you investigate? &nb
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(Open whole case)
25.8k
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Intermediate
Difficulty
Du berätst eine große europäische Fluggesellschaft. Der Vorstandsvorsitzende überlegt, eine neue Sitzklassen-Kategorie, die „Premium Economy“, zwischen der Economy und der First Class einzuführen. Er will von Dir wissen, ob dies eine gute Idee ist.
Du berätst eine große europäische Fluggesellschaft. Der Vorstandsvorsitzende überlegt, eine neue Sitzklassen-Kategorie, die „Premium Economy“, zwischen der Economy und der First Class einzuführen. Er will von Dir wissen, ob dies eine gute Idee ist.
(Open whole case)
10.8k
Times solved
Advanced
Difficulty
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Your client, BusCo, is a passenger bus company in Uganda, Africa. Due to the poor road conditions, maintenance plays a very important role in the reliability and quality of BusCo’s services.BusCo outsourced all of its bus maintenance operations to MaintainCo in the last years. However, especially la
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Your client, BusCo, is a passenger bus company in Uganda, Africa. Due to the poor road conditions, maintenance plays a very important role in the reliability and quality of BusCo’s services.
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(Open whole case)
17.6k
Times solved
Beginner
Difficulty
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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?
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?
(Open whole case)
18.2k
Times solved
Beginner
Difficulty
Expert case by Giulia
Your client is a US-based manufacturer of branded cookies, Gumbread Inc. The client realized that their sales have declined in recent years. The client wants to know what they should do to do drive sales again.
Your client is a US-based manufacturer of branded cookies, Gumbread Inc. The client realized that their sales have declined in recent years. The client wants to know what they should do to do drive sales again.
(Open whole case)
5.0k
Times solved
Intermediate
Difficulty
Your client is a chewing gum manufacturer.The CEO of the manufacturing company wants you to find out why his company is experiencing a declining profit margin. He then wants you to suggest ways to improve his company’s profit margin.
Your client is a chewing gum manufacturer.The CEO of the manufacturing company wants you to find out why his company is experiencing a declining profit margin. He then wants you to suggest ways to improve his company’s profit margin.
(Open whole case)
56.9k
Times solved
Beginner
Difficulty
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Beyer, one of the biggest pharmaceutical companies in the world, just invented a very reliable vaccine against Chickenpox, a disease that affects children in the age from 2 to 16 years.Beyer came to you wondering what their potential sales in Europe in the first year would be if they launched this p
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Beyer, one of the biggest pharmaceutical companies in the world, just invented a very reliable vaccine against Chickenpox, a disease that affects children in the age from 2 to 16 years.Beyer
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(Open whole case)
61.9k
Times solved
Advanced
Difficulty
Our client is an electronics holding called Chip’n’Chip.They want to invest in a Printed Circuit Board (PCB) manufacturer called OnBoard, and asked you whether it’s going to be a good investment.How would you help them?
Our client is an electronics holding called Chip’n’Chip.They want to invest in a Printed Circuit Board (PCB) manufacturer called OnBoard, and asked you whether it’s going to be a good investment.How would you help them?
(Open whole case)
37.4k
Times solved
Advanced
Difficulty
Your client is the CEO of Wiehle, a major household appliance manufacturer. It has been decided that a coffee machine should be added to the product line. The question is how this coffee machine should be designed: either to exclusively use Wiehle pads or to be compatible with the pads of existing t
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Your client is the CEO of Wiehle, a major household appliance manufacturer. It has been decided that a coffee machine should be added to the product line. The question is how this coffee mac
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(Open whole case)
5.8k
Times solved
Intermediate
Difficulty
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DairyCo, a mid-sized CPG manufacturer (consumer packaged goods) which sells dairy products (derived from milk), has turned to you to ask for your advice.The firm has been facing declining profits in the last few years and does not know what it should do to change this trend.How would you help them o
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DairyCo, a mid-sized CPG manufacturer (consumer packaged goods) which sells dairy products (derived from milk), has turned to you to ask for your advice.The firm has been facing declining pr
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(Open whole case)
20.7k
Times solved
Intermediate
Difficulty
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Deep water is a European manufacturer of small yachts and premium boats for private customers. The company operates in Europe and the Middle East and is based in Northern European country, where its manufacturing site, as well as HQ, are located. Deep Water has a strong and recognizable brand as a m
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Deep water is a European manufacturer of small yachts and premium boats for private customers. The company operates in Europe and the Middle East and is based in Northern European country, w
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(Open whole case)
1.9k
Times solved
Advanced
Difficulty
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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. ho
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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
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(Open whole case)
81.0k
Times solved
Beginner
Difficulty
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Your client is a German manufacturer of disguises for events and parties called KostümCo. They segment their products in two lines: round-the-year and seasonal products.Round-the-year products serve customers that celebrate birthdays and common parties during the whole year.Seasonal products aim at
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Your client is a German manufacturer of disguises for events and parties called KostümCo. They segment their products in two lines: round-the-year and seasonal products.Round-the-year produc
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(Open whole case)
38.0k
Times solved
Beginner
Difficulty
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Ein Restaurantinhaber überlegt sich, Schulen mit Essen zu beliefern. Für seine Überlegungen würde er gerne wissen, wie viel Geld er verdienen würde, wenn er 1% der Schulkantinen-Mittagessen in Deutschland verkauft?
Ein Restaurantinhaber überlegt sich, Schulen mit Essen zu beliefern. Für seine Überlegungen würde er gerne wissen, wie viel Geld er verdienen würde, wenn er 1% der Schulkantinen-Mittagessen in Deutschland verkauft?
(Open whole case)
5.7k
Times solved
Intermediate
Difficulty
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Your client is a direct mail clothing retailer. They primarily sell clothes through their product catalog. Next year, postage costs will increase to 40 cents per catalog. Your client wants to know whether his current business model is still profitable.
Your client is a direct mail clothing retailer. They primarily sell clothes through their product catalog. Next year, postage costs will increase to 40 cents per catalog. Your client wants to know whether his current business model is still profitable.
(Open whole case)
22.1k
Times solved
Beginner
Difficulty
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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 last year.He wants you to help him figure out what they need to do in order to achieve the previous year’s revenues again.
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 last year.He wants you to help him figure out what they need to do in order to achieve the previous year’s revenues again.
(Open whole case)
12.5k
Times solved
Intermediate
Difficulty
Topics:
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?
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?
(Open whole case)
43.4k
Times solved
Intermediate
Difficulty
Style:
Our client is a French holding company with annual revenues of about €1 billion. Their portfolio consists of different companies that are mostly in manufacturing industries such as the oil & gas industry and the automotive industry.They do not have a specific investm
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Our client is a French holding company with annual revenues of about €1 billion. Their portfolio consists of different companies that are mostly in manufacturing
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(Open whole case)
45.5k
Times solved
Intermediate
Difficulty
Any Open Questions Left? Check Out Our FAQ
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.