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Company case by Bain & Company
Our client BeautyCo is a large European perfumery company with over 1,000 shops across Europe. However, BeautyCo has been struggling with declining 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 c ... Our client BeautyCo is a large European perfumery company with over 1,000 shops across Europe. However, BeautyCo has been struggling with declining profitability for some time and would like ... (Open whole case)
15.3k
Times solved
3.5
< 100 Ratings
Beginner
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)
103.8k
Times solved
4.1
3.7k Ratings
Beginner
Difficulty
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)
73.9k
Times solved
4.4
4.6k Ratings
Beginner
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)
100+
Times solved
0.0
< 100 Ratings
Beginner
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)
200+
Times solved
0.0
< 100 Ratings
Beginner
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)
700+
Times solved
3.0
< 100 Ratings
Beginner
Difficulty
Expert case by Ian
Our client is Korean Car Parts (KCP), a multi-national original equipment manufacturer (OEM) of car parts based in Korea. They've recently seen a decline in profits and have brought us in to understand how to address this falling profitability.==================================== ... Our client is Korean Car Parts (KCP), a multi-national original equipment manufacturer (OEM) of car parts based in Korea. They've recently seen a decline in profits and have b ... (Open whole case)
5.5k
Times solved
4.3
< 100 Ratings
Beginner
Difficulty
Expert case by Ian
Prompt The United States is currently facing a major supply chain crisis due to long ship queues and wait times at its West Coast ports, particularly at the Port of Los Angeles. Docks are at maximum capacity, and the system is at a breaking point. The government has reached out to you to help f ... Prompt The United States is currently facing a major supply chain crisis due to long ship queues and wait times at its West Coast ports, particularly at the Port of Los Angeles. Docks a ... (Open whole case)
1.0k
Times solved
1.5
< 100 Ratings
Beginner
Difficulty
Expert case by Hagen
Sprinker is a mid-sized, US-based publishing agency that develops, produces, and sells educational materials. It has come to their attention that some private schools are considering changing their first-grade textbooks, for which they would need a publishing agency.Sprinker is interested in partici ... Sprinker is a mid-sized, US-based publishing agency that develops, produces, and sells educational materials. It has come to their attention that some private schools are considering changin ... (Open whole case)
17.2k
Times solved
4.5
3.9k Ratings
Beginner
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)
13.3k
Times solved
2.8
< 100 Ratings
Beginner
Difficulty
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 other supermarkets and fast food chains, Barb is worried whether his shop is working alright, as lately profits have been stagnating. He had figured th ... 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 other supermarkets and fast food chains, ... (Open whole case)
13.2k
Times solved
4.5
500+ Ratings
Beginner
Difficulty
You have successfully completed your trainings for your new role as Consultant at a consulting firm from PrepLounge’s FastTrack Application pool. After a briefing done by the CEO of an internationally known, globally operating industry corporation regarding the upcoming examination of the commercial ... You have successfully completed your trainings for your new role as Consultant at a consulting firm from PrepLounge’s FastTrack Application pool. After a briefing done by the CEO of an inter ... (Open whole case)
4.9k
Times solved
3.0
< 100 Ratings
Beginner
Difficulty
The airlines covering the Cologne to London route are facing a competitive threat from a new rail tunnel connecting Britain and Germany by train. Which all factors do you think the airlines should consider before reacting to this threat? The airlines covering the Cologne to London route are facing a competitive threat from a new rail tunnel connecting Britain and Germany by train. Which all factors do you think the airlines should consider before reacting to this threat? (Open whole case)
5.1k
Times solved
3.8
< 100 Ratings
Beginner
Difficulty
We are a reputed law firm. We are thinking of hiring associates right out of college at $120,000 per year. Do you think it is a good idea? We are a reputed law firm. We are thinking of hiring associates right out of college at $120,000 per year. Do you think it is a good idea? (Open whole case)
5.5k
Times solved
4.0
100+ Ratings
Beginner
Difficulty
We are thinking of establishing a door-to-door distribution of an existing online newspaper in Kolkata, India. We haven't spent much time on how the process would work in practice yet. Can you help us evaluate the feasibility of the plan? We are thinking of establishing a door-to-door distribution of an existing online newspaper in Kolkata, India. We haven't spent much time on how the process would work in practice yet. Can you help us evaluate the feasibility of the plan? (Open whole case)
4.7k
Times solved
3.7
100+ Ratings
Beginner
Difficulty
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 need to aggressively cut costs in order to return to profitability. We also suspect the over-operated routes as well as the new ro ... 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 need to aggressively cut costs in order ... (Open whole case)
5.4k
Times solved
3.8
300+ Ratings
Beginner
Difficulty
A major juice producer sells packaged fruit juice to retail outlets. Normally, the juice is packed and sold in 16-ounce carton containers, but recently the producer added a new machine that packages the juice in 32-ounce plastic containers. So he was selling both the 16-ounce & the 32-ounce prod ... A major juice producer sells packaged fruit juice to retail outlets. Normally, the juice is packed and sold in 16-ounce carton containers, but recently the producer added a new machine that ... (Open whole case)
4.9k
Times solved
3.9
400+ Ratings
Beginner
Difficulty
Our client is a local shipping firm in Spain where they handle local shipping of packages delivered by international shipping firms like FedEx, UPS & DHL. These firms deliver packages to the key city hubs and then our client takes it from there.They want to know how many trucks they should lease ... Our client is a local shipping firm in Spain where they handle local shipping of packages delivered by international shipping firms like FedEx, UPS & DHL. These firms deliver packages to ... (Open whole case)
4.8k
Times solved
4.2
300+ Ratings
Beginner
Difficulty
Your client is a chewing gum manufacturer in the United Kingdom and you’re currently at the airport waiting for your flight. In the time that you have, you’re thinking about how big the annual chewing gum market is in the UK in terms of market value. Your client is a chewing gum manufacturer in the United Kingdom and you’re currently at the airport waiting for your flight. In the time that you have, you’re thinking about how big the annual chewing gum market is in the UK in terms of market value. (Open whole case)
8.0k
Times solved
4.5
400+ Ratings
Beginner
Difficulty
You’re a consultant based in Germany who is currently en route to a client in France who sells golf balls. You’re thinking about the client trying to figure out how large the market is for golf balls in France in terms of number of balls purchased each year.  You’re a consultant based in Germany who is currently en route to a client in France who sells golf balls. You’re thinking about the client trying to figure out how large the market is for golf balls in France in terms of number of balls purchased each year.  (Open whole case)
6.2k
Times solved
4.1
400+ Ratings
Beginner
Difficulty
1 - 20 of 32 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.

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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 Candidate-led cases - Beginner

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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