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The Case Interview Format

When applying to top consulting firms, one of the most crucial stages of the interview process is the case interview. This format is designed to assess your analytical competencies, problem-solving skills, and ability to think strategically under pressure. Let's take a look at what to expect.  
 

 

Structure of a Case Interview

A case interview is a 30-minute simulation of a typical business project that consultants may have worked on. Cases provide a real example of an on-the-job experience and the assumption is that if a candidate is successfully able to tackle a case interview, he or she is also more likely to be a successful management consultant.

Case studies are the most important and usually the longest part of consulting interviews. In addition to the case study, the interview typically includes introductory small talk, a personal fit interview, and closing questions (see the illustration below).

The graph shows the process of a case-interview, based on 4 steps.

Many companies review and standardize their consulting cases prior to a real interview to ensure that the case is neither too difficult nor too easy. Companies also ensure that a variety of skills are tested during the interviews.

 

The Typical Flow of a Case Interview

The case interview typically follows a structured flow to ensure that both the interviewer and the candidate cover all necessary aspects of the business problem. It involves the following phases:

1. Case Presentation and Problem Understanding

To start off, the interviewer will present a specific business problem or scenario. This could range from market entry considerations, to profitability issues, or organizational changes. The problem is usually based on real-world business issues that the consulting firm dealt with in the past.

You are expected to listen carefully, take notes, and clarify any points that are not clear to fully understand the scope and context of the problem.

👉 To get a better feeling for possible case prompts, check out the following beginner cases. 

Company case by
DHL Consulting
DHL Consulting case: Bike Shop
90.4k times solved
Difficulty: Beginner
Interviewer-led
Growth strategy
Profitability analysis
You have been hired to support the owner of a bike-shop as a business consultant. The bike-shop has suffered a sign(...)
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(...)
Expert case by
FastFood Chain Turnaround
1.2k times solved
Difficulty: Beginner
Candidate-led
Profitability analysis
Our client (FastFood Co) is a fast-food company that has > 20 restaurants in the city. Recently, the business has enc(...)
Our client (FastFood Co) is a fast-food company that has > 20 restaurants in the city. Recently, the business has encountered significant challenge(...)
Company case by
Oliver Wyman
Oliver Wyman Case: Setting up a Wine Cellar
117.8k times solved
Difficulty: Beginner
Candidate-led
Profitability analysis
I’m thinking about setting up a wine cellar in my basement. The way I see it, shelf space would be divided into two sect(...)
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(...)

2. Framework Development

Afterwards, you outline a structured approach or framework to tackle the problem. Common frameworks include the SWOT analysis, Porter’s Five Forces, or the 4P's, with which you can structure your information. This step demonstrates your ability to break down complex issues into manageable parts.

However, keep in mind that it is not enough to simply memorize the standard framework concepts. While standard frameworks are useful for a rudimentary outline of a case problem, they need to be optimized and adapted to the individual case. Don't worry, as this is a skill you can develop, but it definitely requires thorough preparation and practice

Once you have crafted your structure, clearly explain your framework to the interviewer, ensuring he or she understands your thought process and logical flow.

3. Analysis and Problem Solving

Next, you dive into the analysis. During the interview, your interviewer may provide additional data, charts or exhibits. Analyze this information to support your framework and build your argument. Formulate hypotheses based on your analysis and test them against the data provided. If needed, adjust your approach based on your new findings.

During the quantitative analysis, perform the necessary calculations to support your findings. This could include market sizing estimations, profitability calculations or a cost analysis. Good mental math skills will definitely help in this phase. 

4. Recommendations

Once you have worked through your structure, provide clear, and actionable recommendations based on your analysis. Use the Pyramid Principle of communication, highlight your key findings and explain how they address the problem.

You should also be ready to justify your suggestions with evidence from your analysis (i. e. data) and discuss possible next steps or further areas of investigation that the client may wish to consider.

After all, the interviewer may question your conclusions or ask for further clarification. Be prepared to defend your recommendations and discuss alternative perspectives. 

After, all the best way to prepare for your interview is practice. Explore our Case Library with real examples now!

Company case by
Oliver Wyman
Oliver Wyman Case: Full Electrons Ahead
136.7k times solved
Difficulty: Intermediate
Candidate-led
Growth strategy
Market analysis
Market sizing
Operations strategy
Your client, large automotive OEM WyCar, has developed its first fully electric vehicle (EV) and introduced it as a pilo(...)
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(...)
Expert case by
Grain Co-operative – Brand Launch
4.6k times solved
Difficulty: Intermediate
Interviewer-led
Market sizing
New product
Pricing
MeGrain is a co-operative of 5000 farmers in the central part of India. As a co-operative, the farmers came together to(...)
MeGrain is a co-operative of 5000 farmers in the central part of India. As a co-operative, the farmers came together to sell the grains to retailers a(...)
Case by
PrepLounge
Derivatives & Hedging – Interview Questions for Finance
< 100 times solved
Difficulty: Advanced
Interviewer-led
Mergers & Acquisition
This question set explores how companies use forwards, swaps, and options in practice to manage risk. You’ll cover theor(...)
This question set explores how companies use forwards, swaps, and options in practice to manage risk. You’ll cover theory, applications, and calculati(...)
Company case by
Roland Berger
Roland Berger Case: Onlinestar
110.6k times solved
Difficulty: Intermediate
Candidate-led
Growth strategy
Market analysis
Profitability analysis
Onlinestar, an online retailer of furniture and garden products (core business), has grown significantly in recent years(...)
Onlinestar, an online retailer of furniture and garden products (core business), has grown significantly in recent years as a result of an expansion o(...)
Case by
PrepLounge
Unified Health
20.4k times solved
Difficulty: Intermediate
Interviewer-led
Profitability analysis
Public sector
Our client is Unified Health, a health care company in the US. It insures patients and provides health care services. Em(...)
Our client is Unified Health, a health care company in the US. It insures patients and provides health care services. Employers pay a premium to UH fo(...)
Expert case by
Merger of two beer manufacturers
8.8k times solved
Difficulty: Advanced
Candidate-led
Competitive response
Growth strategy
Market analysis
Mergers & Acquisition
Operations strategy
Restructuring
Our clients are two beer manufacturers from a well-developed country who just decided to merge. We can call them Company(...)
Our clients are two beer manufacturers from a well-developed country who just decided to merge. We can call them Company A and Company B. The decision(...)
Case by
PrepLounge
Coffee pads
6.1k times solved
Difficulty: Intermediate
Interviewer-led
Growth strategy
Market entry
New product
Profitability analysis
Your client is the CEO of Wiehle, a major household appliance manufacturer. It has been decided that a coffee machine sh(...)
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 l(...)
Case by
PrepLounge
Energy Sector Valuation & Interview Questions for Finance
< 100 times solved
Difficulty: Intermediate
Interviewer-led
Mergers & Acquisition
Valuing energy and natural resources companies is very different from other industries. Commodity price swings, capital(...)
Valuing energy and natural resources companies is very different from other industries. Commodity price swings, capital intensity, and the role of res(...)
Case by
PrepLounge
Make Steakhouse Great Again!
7.8k times solved
Difficulty: Advanced
Candidate-led
Capacity change
Growth strategy
Operations strategy
Your client is a Franchisee of a popular Steakhouse-chain in Germany. The Franchisee currently owns 2 Steakhouse-restaur(...)
Your client is a Franchisee of a popular Steakhouse-chain in Germany. The Franchisee currently owns 2 Steakhouse-restaurants and wants you to investig(...)
Case by
PrepLounge
A DSL Provider
13.8k times solved
Difficulty: Intermediate
Candidate-led
Competitive response
Market entry
Profitability analysis
Your client is a large company in the Polish telecommunication sector, providing and maintaining the infrastructure for(...)
Your client is a large company in the Polish telecommunication sector, providing and maintaining the infrastructure for telephony and ADSL and offerin(...)
Case by
PrepLounge
ACR Medical Lab
39.5k times solved
Difficulty: Intermediate
Interviewer-led
Market analysis
Operations strategy
Profitability analysis
Your client, ACR, is a chain of medical laboratories. They provide patients with MRI and CT scans as well as other major(...)
Your client, ACR, is a chain of medical laboratories. They provide patients with MRI and CT scans as well as other major tests.They have expensive tes(...)
Expert case by
New
Revolut Mock Interview: Strategy & Operations
< 100 times solved
Difficulty: Advanced
Interviewer-led
Operations strategy
You are part of the Strategy & Operations team at Revolut.Revolut has had significant growth over the past couple of(...)
You are part of the Strategy & Operations team at Revolut.Revolut has had significant growth over the past couple of years, with customer base gro(...)
Company case by
BCG Platinion
BCG Platinion Case: Digital transformation of an entire corporation
22.1k times solved
Difficulty: Advanced
Interviewer-led
Digital transformation
Market analysis
Operations strategy
The CIO of a major insurance company needs your support to renew the company's IT landscape as a starting point for thei(...)
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 I(...)
MBMC Case: Exploring the future of automotive mobility
10.1k times solved
Difficulty: Intermediate
Interviewer-led
New product
Profitability analysis
As a consultant at Mercedes-Benz Management Consulting (MBMC), you are actively shaping the future of automotive mobilit(...)
As a consultant at Mercedes-Benz Management Consulting (MBMC), you are actively shaping the future of automotive mobility. While you are contributing(...)
Expert case by
Updated
MBB Unconventional Case: Coral Reefs
< 100 times solved
Difficulty: Advanced
Candidate-led
Non-conventional
Public sector
Your client is the Government of Indonesia, specifically a joint committee formed between a few key ministries including(...)
Your client is the Government of Indonesia, specifically a joint committee formed between a few key ministries including the Ministry of Marine Affair(...)
Case by
PrepLounge
Rally racing
9.4k times solved
Difficulty: Beginner
Candidate-led
Market entry
Profitability analysis
Your client is the owner of UBS #42, a rally racing team. There are 36 races in a season. At the end of the season, the(...)
Your client is the owner of UBS #42, a rally racing team. There are 36 races in a season. At the end of the season, the driver who has earned the most(...)
Expert case by
Updated
McKinsey Unconventional Case: Inclusive Cafes
100+ times solved
Difficulty: Intermediate
Interviewer-led
Non-conventional
Your client is a leading retail coffee chain. They are present in several countries globally and are a popular brand in(...)
Your client is a leading retail coffee chain. They are present in several countries globally and are a popular brand in most of the markets that they(...)
Case by
PrepLounge
Diagnosis: Acquisition ache
13.0k times solved
Difficulty: Advanced
Candidate-led
Growth strategy
Market analysis
New product
Organizational behavior
Public sector
Your client is part of AtoZ Ltd., a diversified multinational company with a health care division that produces medical(...)
Your client is part of AtoZ Ltd., a diversified multinational company with a health care division that produces medical instruments and related servic(...)
Company case by
Bain & Company
Bain Case: BeautyCo – Where Did the Profits Go?
57.4k times solved
Difficulty: Intermediate
Candidate-led
Market analysis
Profitability analysis
Our client BeautyCo is a large European perfumery company with 500 shops across Europe. However, BeautyCo has been strug(...)
Our client BeautyCo is a large European perfumery company with 500 shops across Europe. However, BeautyCo has been struggling with a decrease in profi(...)

Key Takeaways for Your Case Interview Success

Mastering the case interview is a crucial step in securing a consulting job. To perform well, you need to demonstrate structured thinking, analytical skills, and clear communication while solving a real-world business problem.

The interview typically follows a structured flow, starting with an introduction and resume discussion, followed by the case presentation, where you clarify the problem and outline a logical framework. From there, you analyze data, test hypotheses, and apply quantitative skills to arrive at well-supported recommendations. Finally, you summarize your findings and engage in a discussion to defend your approach.

Success in case interviews comes down to practice. Familiarizing yourself with common frameworks is useful, but true preparation involves adapting them to different cases, improving your problem-solving speed, and refining your communication. By structuring your thoughts clearly, staying flexible in your approach, and confidently presenting your findings, you’ll increase your chances of impressing your interviewer and landing an offer at a top consulting firm. 🚀

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