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.
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.
Expert case by Alberto
New
Style:
Topics:
Our client is Chic & Stitch. They make tailor-made clothes for modern women. They focus on quality and fit. Their work covers design, retail, and tailoring. Now, they want to expand to the Barcelona. They hired you to see if that’s a good idea.
Our client is Chic & Stitch. They make tailor-made clothes for modern women. They focus on quality and fit. Their work covers design, retail, and tailoring. Now, they want to expand to the Barcelona. They hired you to see if that’s a good idea.
(Open whole case)
200+
Times solved
Advanced
Difficulty
Company case by Mercedes-Benz Management Consulting
As a consultant at Mercedes-Benz Management Consulting (MBMC), you actively shape the desire for Mercedes-Benz as an iconic luxury brand. While you contribute to decisive projects that design the future of the world’s No.1 premium carmaker, you also develop your own career path, and have the unique
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As a consultant at Mercedes-Benz Management Consulting (MBMC), you actively shape the desire for Mercedes-Benz as an iconic luxury brand. While you contribute to decisive projects that desig
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(Open whole case)
3.8k
Times solved
Intermediate
Difficulty
Company case by Telekom Strategy Consulting
You recently joined Deutsche Telekom as a strategic project manager for the fiber optic expansion initiative. In this role, you act as an internal consultant, providing strategic guidance to ensure a successful fiber optic rollout in a mid-sized German city known for its vibrant tech industry. Your
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You recently joined Deutsche Telekom as a strategic project manager for the fiber optic expansion initiative. In this role, you act as an internal consultant, providing strategic guidance to
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(Open whole case)
3.8k
Times solved
Intermediate
Difficulty
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Company case by Mercedes-Benz Management Consulting
As a consultant at Mercedes-Benz Management Consulting (MBMC), you are actively shaping the future of automotive 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 possi
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As a consultant at Mercedes-Benz Management Consulting (MBMC), you are actively shaping the future of automotive mobility. While you are contributing to decisive projects that design the fut
...
(Open whole case)
6.9k
Times solved
Intermediate
Difficulty
Company case by accilium
Our client, Transportation Tech Co., is a key player in the transportation space. Recently, the client developed an innovative "kids in school (KIS)" device which it believes could prove valuable to schools and parents in Austria or Germany. We have been engaged to help our client determine whether
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Our client, Transportation Tech Co., is a key player in the transportation space. Recently, the client developed an innovative "kids in school (KIS)" device which it believes could prove val
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(Open whole case)
4.2k
Times solved
Intermediate
Difficulty
Company case by Roland Berger
Style:
Sensorio Hightech GmbH is a leading manufacturer of technically advanced consumer electronics sensors based in Germany with EUR 500 m in revenues. It is a successfully growing affiliate with technically advanced consumer electronics sensors as its main business. Sensorio Hightech GmbH is looking at
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Sensorio Hightech GmbH is a leading manufacturer of technically advanced consumer electronics sensors based in Germany with EUR 500 m in revenues. It is a successfully growing affiliate with
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(Open whole case)
13.7k
Times solved
Intermediate
Difficulty
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
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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
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(Open whole case)
9.4k
Times solved
Intermediate
Difficulty
Company case by Bain & Company
Style:
Our client BeautyCo is a large European perfumery company with 500 shops across Europe. However, BeautyCo has been struggling with a decrease in profitability for some time and would like to work with us to understand what the causes and possible actions could be. Therefore, as a first step the clie
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Our client BeautyCo is a large European perfumery company with 500 shops across Europe. However, BeautyCo has been struggling with a decrease in profitability for some time and would like to
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(Open whole case)
29.3k
Times solved
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
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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
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(Open whole case)
5.4k
Times solved
Intermediate
Difficulty
Company case by thyssenkrupp Management Consulting
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
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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
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(Open whole case)
7.1k
Times solved
Intermediate
Difficulty
Company case by E.ON Inhouse Consulting
Topics:
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
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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
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(Open whole case)
3.0k
Times solved
Intermediate
Difficulty
Company case by SET Management Consulting
As one of three management consultants with many years of experience, you have SET yourself the goal of founding your own management consultancy. The topics, contents and solution offering with which you can advise and support potential customers are clear. The legal company is already founded and r
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As one of three management consultants with many years of experience, you have SET yourself the goal of founding your own management consultancy. The topics, contents and solution offering w
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(Open whole case)
9.0k
Times solved
Beginner
Difficulty
Company case by BCG Platinion
The CIO of a major insurance company needs your support to renew the company's IT landscape as a starting point for their digital transformation.The IT landscape of the client is highly fragmented and integrated. Most IT applications are "legacy" monolithic custom developments (running on Mainframe)
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The CIO of a major insurance company needs your support to renew the company's IT landscape as a starting point for their digital transformation.The IT landscape of the client is highly frag
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(Open whole case)
12.0k
Times solved
Advanced
Difficulty
Company case by thyssenkrupp Management Consulting
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
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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 targ
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(Open whole case)
16.3k
Times solved
Intermediate
Difficulty
Company case by RWE Consulting
RWE is an international renewables company with a proud heritage of more than 125 years in the energy business. Recently, during the Capital Markets Day in 2023, RWE’s CEO renewed the company’s 2030 vision of being a global leader in green energy. To achieve this, additional substantial investments
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RWE is an international renewables company with a proud heritage of more than 125 years in the energy business. Recently, during the Capital Markets Day in 2023, RWE’s CEO renewed the compan
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(Open whole case)
22.9k
Times solved
Intermediate
Difficulty
Company case by Simon-Kucher
Style:
Topics:
Cruise company German Sea Tours (GST) is a successful operator of international cruises. GST currently offers several cruise trips, lasting between 5 and 24 days. Additional services can be booked on board (e.g. excursions at each destination, onboard leisure activities). Customers tend to book thei
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Cruise company German Sea Tours (GST) is a successful operator of international cruises. GST currently offers several cruise trips, lasting between 5 and 24 days. Additional services can be
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(Open whole case)
64.3k
Times solved
Intermediate
Difficulty
Company case by Roland Berger
Style:
Onlinestar, an online retailer of furniture and garden products (core business), has grown significantly in recent years as a result of an expansion of its product portfolio. The company mainly imports goods from Chinese manufacturers but also operates its own production of cat lavatories (special b
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Onlinestar, an online retailer of furniture and garden products (core business), has grown significantly in recent years as a result of an expansion of its product portfolio. The company mai
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(Open whole case)
97.7k
Times solved
Intermediate
Difficulty
Company case by Stern Stewart & Co.
Style:
The sporting goods manufacturer TIGER SE which is broadly positioned in Germany wants to increase its sales.The company is fully integrated along its value chain which means that the sporting goods are manufactured in-house and then sold to end consumers through its own distribution c
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The sporting goods manufacturer TIGER SE which is broadly positioned in Germany wants to increase its sales.The company is fully integrated along its value chain which means t
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(Open whole case)
31.5k
Times solved
Intermediate
Difficulty
Company case by Bain & Company
Style:
You have inherited the “Old Winery” from your grandfather, a winery that has been family-owned for five generations and can be dated back to the 16th century.Half of the eleven hectares are used to grow white grapes, the other half to grow red grapes. They are grown in a conventional way, i.e. they
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You have inherited the “Old Winery” from your grandfather, a winery that has been family-owned for five generations and can be dated back to the 16th century.Half of the eleven hectares are
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(Open whole case)
128.0k
Times solved
Intermediate
Difficulty
Company case by EY-Parthenon
Style:
A leading online real estate marketplace in Germany – your-new-home.com – is struggling with stagnating sales after many years of high growth rates. In a preliminary project with EY-Parthenon, the market environment has already been examined in detail – competitors, new entrants, customer needs, etc
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A leading online real estate marketplace in Germany – your-new-home.com – is struggling with stagnating sales after many years of high growth rates. In a preliminary project with EY-Partheno
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(Open whole case)
74.9k
Times solved
Intermediate
Difficulty
Any Open Questions Left? Check Out Our FAQ
What are cases?
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.
