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Company case by E.ON Inhouse Consulting
Climate change has become one of the biggest challenges in the 21st century, and with roughly 75% of all CO₂ emissions coming from energy, this sector plays a key role in the transition to a reduced carbon footprint. E.ON has taken up on the challenge to promote more sustainable and efficient energy ... Climate change has become one of the biggest challenges in the 21st century, and with roughly 75% of all CO₂ emissions coming from energy, this sector plays a key role in the transition to a ... (Open whole case)
4.0k
Times solved
4.3
< 100 Ratings
Intermediate
Difficulty
Company case by Whiteshield Advisory
This case is representative of the type of problems that a client might engage Whiteshield to help them with. Before asking you any questions about the case, I will give you the background that you will need. There are several issues that I would like to cover with you today; please do not be surpri ... This case is representative of the type of problems that a client might engage Whiteshield to help them with. Before asking you any questions about the case, I will give you the background t ... (Open whole case)
2.5k
Times solved
4.5
< 100 Ratings
Intermediate
Difficulty
Your client is a holding company that has three larger companies in its portfolio. The successful portfolio has developed very dynamically over the last two years and the companies are facing different challenges. The management takes this situation as an opportunity and wants to carry out a portfol ... Your client is a holding company that has three larger companies in its portfolio. The successful portfolio has developed very dynamically over the last two years and the companies are facin ... (Open whole case)
3.6k
Times solved
4.5
< 100 Ratings
Intermediate
Difficulty
Company case by Bayer AG
Our client is the US head of Bayer’s Pharmaceuticals divisionIn about 7 months’ time (beginning of 2020) the division expects to receive FDA approval to launch a tricyclic anti-depressant drug. While this apparently good news, the US Pharma organization is concerned over the market potential for thi ... Our client is the US head of Bayer’s Pharmaceuticals divisionIn about 7 months’ time (beginning of 2020) the division expects to receive FDA approval to launch a tricyclic anti-depressant dr ... (Open whole case)
6.6k
Times solved
3.1
< 100 Ratings
Intermediate
Difficulty
Company case by E.ON Inhouse Consulting
The European Union pursues the target of lowering the CO₂ emissions of their residents. Therefore, the EU introduced a CO₂ tax to create incentives for consumers to switch to more climate friendly alternatives and stabilize carbon dioxide emissions. Accordingly, and as E.ON’s strategy focuses o ... The European Union pursues the target of lowering the CO₂ emissions of their residents. Therefore, the EU introduced a CO₂ tax to create incentives for consumers to switch to more climate fr ... (Open whole case)
1.8k
Times solved
4.5
< 100 Ratings
Intermediate
Difficulty
As a consultant at Mercedes-Benz Management Consulting, you are actively shaping the future of mobility. While you are contributing to decisive projects that design the future of the world’s No.1 premium carmaker, you also develop your own career path and you have the unique possibility to build you ... As a consultant at Mercedes-Benz Management Consulting, you are actively shaping the future of mobility. While you are contributing to decisive projects that design the future of the world’s ... (Open whole case)
17.9k
Times solved
3.8
100+ Ratings
Intermediate
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)
400+
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)
600+
Times solved
4.3
< 100 Ratings
Intermediate
Difficulty
Expert case by Cristian
Our client, Element Mobile (EM), is the largest German telecommunications provider, with an impressive supply chain comprised of dozens of suppliers, six distribution centres, and hundreds of stores. EM offers a variety of products to its 20 million customers, including sim cards, broadband, phones, ... Our client, Element Mobile (EM), is the largest German telecommunications provider, with an impressive supply chain comprised of dozens of suppliers, six distribution centres, and hundreds o ... (Open whole case)
4.8k
Times solved
4.5
< 100 Ratings
Intermediate
Difficulty
Expert case by Cristian
Assume our client is CodeWave, a large software development firm headquartered in Silicon Valley. The company has a solid reputation in the tech industry and has been in operation for over 15 years. Codewave currently employs approximately 3,000 people and has rapidly expanded in recent years.  ... Assume our client is CodeWave, a large software development firm headquartered in Silicon Valley. The company has a solid reputation in the tech industry and has been in operation for over 1 ... (Open whole case)
900+
Times solved
5.0
< 100 Ratings
Intermediate
Difficulty
Expert case by Ian
An entrepreneur has come to you looking to disrupt the taxi industry in NYC. They are interested in determining the number of taxis in Manhattan, in order to understand how large their fleet would need to be to compete. How would you go about determining how many taxis exist in Manhattan?If the cand ... An entrepreneur has come to you looking to disrupt the taxi industry in NYC. They are interested in determining the number of taxis in Manhattan, in order to understand how large their fleet ... (Open whole case)
5.0k
Times solved
3.6
< 100 Ratings
Intermediate
Difficulty
Expert case by Ian
Your client is a leading pharmaceutical company that is facing challenges with increasing pipeline costs and longer development timelines for their drug candidates. The company has multiple drug candidates in various stages of development and are looking for innovative strategies to streamline their ... Your client is a leading pharmaceutical company that is facing challenges with increasing pipeline costs and longer development timelines for their drug candidates. The company has multiple ... (Open whole case)
1.1k
Times solved
2.8
< 100 Ratings
Intermediate
Difficulty
Expert case by Cristian
Our client, Hara Coffee Company, is a large coffee chain with over 200 locations in the United Kingdom. They import beans from numerous regions and batch-roast them in the UK, offering customers a vast selection of premium blends. In addition to serving delicious coffee, our client offers freshly ma ... Our client, Hara Coffee Company, is a large coffee chain with over 200 locations in the United Kingdom. They import beans from numerous regions and batch-roast them in the UK, offering custo ... (Open whole case)
1.0k
Times solved
3.5
< 100 Ratings
Intermediate
Difficulty
Expert case by Cristian
GlowMobile is a leading telecom operator with a strong presence in Southeast Asia. They sell regular products and services that any telecom operator would offer in their retail stores: cell phones, SIM cards, subscriptions, etc.Even though the number of digital customers in the region has grown expo ... GlowMobile is a leading telecom operator with a strong presence in Southeast Asia. They sell regular products and services that any telecom operator would offer in their retail stores: cell ... (Open whole case)
3.6k
Times solved
5.0
< 100 Ratings
Intermediate
Difficulty
Expert case by Francesco
Our client is Party Burger, a restaurant chain in the US serving premium burgers and salads for lunch. They rely on the quality of their products to attract customers, and they are usually fully booked. However, reviews have pointed out that the service offered could be improved. Our client is conce ... Our client is Party Burger, a restaurant chain in the US serving premium burgers and salads for lunch. They rely on the quality of their products to attract customers, and they are usually f ... (Open whole case)
4.5k
Times solved
4.5
< 100 Ratings
Intermediate
Difficulty
Expert case by Agrim
Our client is the CEO of BoxxFitness - a leading gym chain in the US with over 1,500 gyms. BoxxFitness is a premium gym concept with an annual membership fee that is 2-3x higher than most mainstream gyms. Each gym has a limited number of membership slots. Each member gets a dedicated locker, unlimit ... Our client is the CEO of BoxxFitness - a leading gym chain in the US with over 1,500 gyms. BoxxFitness is a premium gym concept with an annual membership fee that is 2-3x higher than most ma ... (Open whole case)
3.3k
Times solved
4.3
< 100 Ratings
Intermediate
Difficulty
Expert case by Cristian
Let’s assume our client is Poliglot, a popular language app. Poliglot is five years old, originally from the US, but available worldwide. The app currently offers the possibility of learning over twenty languages for free, with extra benefits (e.g., no ads, additional exercises) available to premium ... Let’s assume our client is Poliglot, a popular language app. Poliglot is five years old, originally from the US, but available worldwide. The app currently offers the possibility of learning ... (Open whole case)
3.0k
Times solved
4.6
< 100 Ratings
Intermediate
Difficulty
Expert case by Clara
Currently, there is only one train company operating the Boston – New York route: AMTRAK. The option of traveling by train between the two metropolis is gaining traffic, particularly in winter times, during which it´s the best way to avoid weather-related delays. Furthermore, it´s the most environme ... Currently, there is only one train company operating the Boston – New York route: AMTRAK. The option of traveling by train between the two metropolis is gaining traffic, particularly in wint ... (Open whole case)
7.2k
Times solved
4.9
< 100 Ratings
Intermediate
Difficulty
Expert case by Jonas
A medium sized butchery company from the US with a limited product portfolio has experienced declining profits in the last years.Advise the CEO on where the problem comes from and develop solutions to improve his situation. A medium sized butchery company from the US with a limited product portfolio has experienced declining profits in the last years.Advise the CEO on where the problem comes from and develop solutions to improve his situation. (Open whole case)
3.5k
Times solved
3.0
< 100 Ratings
Intermediate
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)
4.9k
Times solved
4.1
< 100 Ratings
Intermediate
Difficulty
1 - 20 of 53 results

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.

Crack interviewer-led cases - Intermediate

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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