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.
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EY-Parthenon Case: Virtual Marketplace
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.As a result, you are asked to identify growth areas and quantify the potential sales uplift for the management.
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Oliver Wyman Case: Full Electrons Ahead
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 them on how to adjust the product offering.
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Oliver Wyman Case: On the Right Track
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 rail company. They have asked you advise to them on whether they should place a bid for the contract.
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DHL Consulting case: Bike Shop
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. how it was affected by the revenue decline, and what the priority actions are to survive the next year. (short term)In addition they would like to understand the strategic competitive position of the shop better and how to increase revenues again mid- to long-term.
Novion Therapeutics
Your client is Novion Therapeutics, a leading American biotech company focused on gene and cell therapies. With a market capitalization of around $120 billion, Novion is recognized for its innovations in rare disease treatments and its mission to advance human health through breakthrough biotechnologies in immunology, oncology, and genetic medicine.Recently, the company has faced growing investor pressure. Despite strong products, its firm-value growth has stagnated, and investors are expecting a visible strategic move within the next quarter. The CFO has identified several high-growth, capital-intensive R&D and acquisition projects, but Novion lacks sufficient cash reserves to fund them. What should the CFO do next?
McKinsey Round 1: Homeware Heaven
Our client is Homeware Heaven. They are a homeware and appliance retailer that sells items such as kitchen appliances (fridges, ovens), kitchenware, lighting, bedding and bath products, home decor etc. They have 100 stores in the top 20 cities in the US. Their stores are large stand-alone stores located outside of the city centre. Over the last 3 years, business has not been going well for our client. Their revenue has been declining year over year and they have had fewer unique shoppers in their stores. They have hired McKinsey to help them turnaround the situation
BCG Round 1 Case: Telecommunication Troubles
Your client, Convo Telco, is a leading national telecommunications player in a developing country. They offer both mobile and fixed (e.g. broadband, internet) products across the country. Over the past few years, they have been facing declining profitability and have asked you to help them identify what is the problem
FastFood Chain Turnaround
Our client (FastFood Co) is a fast-food company that has > 20 restaurants in the city. Recently, the business has encountered significant challenges, with net profit drops to negative.The client wants us to help them turn around the business. How would you help them?
Chemical Merger Synergies
Two global chemical companies announced their intent to merge. Senior management of the two companies called your firm the day after the merger was announced. The client needs a more in-depth understanding of the benefits from the merger for its board and would like your firm to help out. In short, 2 questions to solve: (1) what are some of the financial benefits from the merger? (2) how much are these benefits worth?
Pets Medicine Profit Improvement
Your client is a global drug company producing and selling medicine (pills, powder, ointments, injections, etc.) for a variety of pets (dogs, cats, birds, fish etc.). In addition to organic growth, the company grew significantly over the past few years by acquiring several other pets medicine companies in different parts of the world. During this period, profitability of the company decreased significantly. The CEO is concerned with this decline and wants to put in place a plan to raise the profitability to at least 70%.
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Paper Product Overseas Growth
The client is an Indonesian producer of paper boards which can be further processed into paper boxes, shopping bags, etc. They sell in both their domestic market i.e. Indonesia, and in the export market i.e. the US. Revenue last year was $5 billion, with 80% from Indonesia and 20% from the US. Overall they have been growing at 3% annually. The client wants to achieve a 5% growth rate. With the resource constraint they have, they want to focus on one of the two markets. They want to know which market they should go after to achieve that increase in growth rate, and how.
ClaimSmart: AI for Next-Gen Health Insurance
Our client is a mid-sized health insurance provider called SureHealth with annual revenues of $2.4 billion. The company has experienced a steady rise in administrative claims processing costs and has seen a recent uptick in fraudulent claims. Senior leadership believes that leveraging AI in the claims assessment process could have significant benefits.They have allocated a budget of $10 million over the next three years to implement AI solutions, but they are uncertain how to prioritize to reduce fraudulent claims and administrative processing costs.
MBB Second Round - TitanTrail - "Made in the USA" Operations Outsourcing
TitanTrail is a backpack maker that prides itself on quality and a “Made in the USA” promise. But the landscape is shifting. New competitors are entering the market, and labor costs are climbing.To stay competitive, TitanTrail is exploring a big move: outsourcing production to Cambodia. This decision isn’t simple. It raises critical questions.
MBB First Round - FastFashion - Customer Loyalty
FastFashion is a national retail chain in Australia that sells a variety of different clothing brands for men, women, and children. They are one of four major clothing retail chains in the country.Five years ago, they introduced a loyalty program. The Chief Marketing Officer (CMO) of FastFashion wants to assess how this program is doing and what FastFashion can do to improve it.
MBB First Round - StayPro - Consumer Growth Strategy
Your client is StayPro, a San Francisco based technology company that develops and sells wearable and mountable action cameras. StayPro’s CEO believes that the company’s growth has stagnated and has hired you to remedy that issue.
MBB Second Round - Fashion Market Expansion
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.
Grocery Wholesaler
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 was able to ensure sustainable growth; however, profits have plummeted over the last three years.As a result, GroceryWholesaleCo wants to discover the reasons for this decline in profitability and identify strategies to turn the situation around.
Opportunity Assessment: Alternative Revenue Streams for a Salt Mine
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 renewable, regenerative inputs (e.g., energy) and minimizing systematic leakage (e.g., waste).After decades of extracting salt form the earth, Salty Boy’s new leadership find themselves in possession of a network of empty, temperature and moisture stable tunnels located conveniently near major fiberglass waste sources and logistics networks. As a result, Salty Boy sees the potential for an alternative revenue stream. Their rationale is that they have ample and well-located storage capacities in their tunnels that they could use to position themselves well for an emerging recycling trend that could turn fiberglass waste into an eco-friendly and valuable raw material. Salty Boy is looking for your help to assess this potential opportunity.
Business Strategy: Home Delivery Solution for Retailer Chain
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 towels, diapers, blenders). They also sell all non-perishable products offered in their stores through their website. Currently, all sales from their website are delivered via 3rd parties (e.g. FedEx, USPS), picking up products from regional distribution centers, and their minimum delivery time is next day. Kadara does not have out-of-store delivery options but they know that services such as Instacart and Postmates are being used by customers to arrange home delivery of groceries. Kadara's management believes that they are, at best, leaving money on the table due to their limited home delivery options and, at worst, at risk of being de-selected by customers as they move towards delivery options. Kadara’s future CEO, the granddaughter of the founder, has jumped on the chance to move the company into the future. To that end, she has developed a recommendation to Kadara's board to buy Dallas Drone Technologies (DDT). DDT designs, manufactures and operates small-to-midsize flying drones. Their initial models focused on aerial photography but they added goods movement capabilities about two years ago. The future CEO believes that drone delivery is key and that Kadara should buy DDT for USD 100 m to become a leader in the space. Kadara's current CEO would like your help specifically in evaluating the option to buy DDT and generally in how to think about home delivery and the future of their business.
Commercial Feasibility of Natural Gas Pipeline
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-sided dependence on Russia. An initial market study has shown that stable demand in Western Europe would allow for around 10 billion cubic meters (bcm) of natural gas per year from the new gas field to be sold on the European market for the next 25 years. To achieve this, however, the gas must be transported to the important Western European gas hub Baumgarten in Austria. Several large oil and gas companies sense a business opportunity here and are now asking themselves whether it is economically feasible to build a corresponding gas pipeline from Corsica to Austria. One of these companies has approached you as a consultant to provide your assessment.
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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.
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.
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.
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.
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.
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.
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 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.
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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.