Topic Overview
Topic Overview
Getting Started
Learn how to prepare for your case interview in a structured and efficient way, and maximize your chances of success.
Preparation Plan
Self Study
Practice With Peers
Practice with Coaches
Learn all about the different types of cases in consulting interviews and how to be well-prepared for every challenge.
Market Sizing
Market Entry
Brainteaser
Growth Strategy
M&A Cases
Pricing
Competitive Response
Valuation Cases
Profitability Cases
Structuring
Understand why a clear structure is crucial in case interviews and how it helps you solve complex cases efficiently.
Approaching a Case
How to Build a Good Structure
How to Communicate Your Structure
How to Practice Structure
Math in Case Interviews
Learn about the most common mathematical requirements in case interviews and how to handle them confidently and efficiently.
Why Math Matters
Fast Math
How to Practice Math Skills
Back to overview

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. 

Case by
PrepLounge
DHL Consulting case: Bike Shop
4.4
89.9k 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
5.0
1.1k 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
4.1
117.2k 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
4.4
135.4k 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(...)
Case by
PrepLounge
ChemCo Foods
4.0
5.2k times solved
Difficulty: Intermediate
Candidate-led
Market analysis
Profitability analysis
A chemical producer is a major manufacturer of chemical products used to preserve foods in containers. The company has s(...)
A chemical producer is a major manufacturer of chemical products used to preserve foods in containers. The company has seen an increase in market shar(...)
Case by
PrepLounge
From online to offline
3.7
4.8k times solved
Difficulty: Beginner
Candidate-led
Operations strategy
We are thinking of establishing a door-to-door distribution of an existing online newspaper in Kolkata, India. We haven'(...)
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 p(...)
Expert case by
Russell University - Fresh Attacker on the Online Education Market (McKinsey 1st round)
5.0
4.2k times solved
Difficulty: Beginner
Interviewer-led
Competitive response
Growth strategy
Market entry
Mergers & Acquisition
Public sector
Restructuring
Valuation
Russell University, located in the United Kingdom, is one of the oldest and most prestigious universities in the world.(...)
Russell University, located in the United Kingdom, is one of the oldest and most prestigious universities in the world. They have been educating stude(...)
Expert case by
Double trouble
4.4
6.3k times solved
Difficulty: Intermediate
Interviewer-led
Growth strategy
Operations strategy
Profitability analysis
Our client is RedBus, one of several operators of iconic double-decker public transport buses in London. Over the past t(...)
Our client is RedBus, one of several operators of iconic double-decker public transport buses in London. Over the past three years RedBus have experie(...)
Case by
PrepLounge
Intermediate Valuation & DCF Interview Questions for Finance
5.0
200+ times solved
Difficulty: Intermediate
Interviewer-led
Mergers & Acquisition
Valuation
This intermediate-level question set covers key concepts in valuation, with a particular focus on the Discounted Cash Fl(...)
This intermediate-level question set covers key concepts in valuation, with a particular focus on the Discounted Cash Flow (DCF) method. You'll review(...)
Case by
PrepLounge
Gambling Business
4.3
11.8k times solved
Difficulty: Intermediate
Interviewer-led
Competitive response
Market entry
Profitability analysis
Poker Inc. is currently operating four casinos in Royal City. Competitors are right now planning to open up a rival casi(...)
Poker Inc. is currently operating four casinos in Royal City. Competitors are right now planning to open up a rival casino in Kingsville.Poker Inc. ha(...)
Company case by
Roland Berger
Roland Berger Case: Onlinestar
4.2
109.1k 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
General Holding
4.3
47.2k times solved
Difficulty: Intermediate
Candidate-led
Market analysis
Mergers & Acquisition
Our client is a French holding company with annual revenues of about €1 billion.     Their portfolio(...)
Our client is a French holding company with annual revenues of about €1 billion.     Their portfolio consists of different compani(...)
Expert case by
BCG Platinion/McK Digital/Monitor - Experienced Hire Tech Practice - Roma Solutions
3.7
7.6k times solved
Difficulty: Intermediate
Candidate-led
Brain teaser
Market analysis
Market entry
Mergers & Acquisition
New product
Let’s say we’re working with a large Tech company (i.e. FB, Apple, Microsoft etc.). They are interested in getting into(...)
Let’s say we’re working with a large Tech company (i.e. FB, Apple, Microsoft etc.). They are interested in getting into the low-code iBPMS space. This(...)
MBMC Case: Software-Revolution im Automobilsektor
4.8
7.3k times solved
Difficulty: Intermediate
Interviewer-led
New product
Profitability analysis
Ein Automobilhersteller hat zu einer Strategiekonferenz mit dem Vorstand eingeladen. Es soll die zukünftige Positionieru(...)
Ein Automobilhersteller hat zu einer Strategiekonferenz mit dem Vorstand eingeladen. Es soll die zukünftige Positionierung des Unternehmens diskutiert(...)
Expert case by
Espresso, Whatelse?
4.6
18.1k times solved
Difficulty: Advanced
Interviewer-led
Market analysis
Operations strategy
Pricing
Profitability analysis
Espresso Whatelse is an Italian company that produces coffee and espresso machines since 1908. It is the Italian market(...)
Espresso Whatelse is an Italian company that produces coffee and espresso machines since 1908. It is the Italian market leader and has a strong presen(...)
Case by
PrepLounge
Enterprise & Equity Value Interview Questions for Finance
5.0
200+ times solved
Difficulty: Beginner
Interviewer-led
Valuation
This set of questions is designed to help you master the fundamentals of Enterprise Value (EV) and Equity Value. The que(...)
This set of questions is designed to help you master the fundamentals of Enterprise Value (EV) and Equity Value. The questions start with basic concep(...)
Case by
PrepLounge
Was machen wir mit der Datenflut?
4.3
3.9k times solved
Difficulty: Intermediate
Interviewer-led
New product
Operations strategy
Profitability analysis
Dein Kunde ist ein großer Automobilkonzern. Dieser erhält eine große Menge an Daten von den verkauften Autos. Er mö(...)
Dein Kunde ist ein großer Automobilkonzern. Dieser erhält eine große Menge an Daten von den verkauften Autos. Er möchte von Dir wissen, welche Mö(...)
Case by
PrepLounge
Unified Health
4.3
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(...)
Case by
PrepLounge
Fashion mail order
4.3
22.5k times solved
Difficulty: Beginner
Candidate-led
Growth strategy
Market analysis
Profitability analysis
Your client is a direct mail clothing retailer. They primarily sell clothes through their product catalog. Nex(...)
Your client is a direct mail clothing retailer. They primarily sell clothes through their product catalog. Next year, postage costs will inc(...)
Company case by
Telekom Strategy Consulting
Telekom Strategy Consulting Case: Fiber Optic Expansion
4.3
10.7k times solved
Difficulty: Intermediate
Interviewer-led
Market analysis
Profitability analysis
You recently joined Deutsche Telekom as a strategic project manager for the fiber optic expansion initiative. In this ro(...)
You recently joined Deutsche Telekom as a strategic project manager for the fiber optic expansion initiative. In this role, you act as an internal con(...)
Case by
PrepLounge
Daily Journal
4.1
15.4k times solved
Difficulty: Intermediate
Interviewer-led
Growth strategy
Market sizing
Our client, Daily Journal is a highly respected & upscale newspaper which is read widely in the UK. The paper is pos(...)
Our client, Daily Journal is a highly respected & upscale newspaper which is read widely in the UK. The paper is positioned between the Wall Stree(...)
Company case by
Bain & Company
Bain Case: BeautyCo – Where Did the Profits Go?
4.5
54.5k 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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