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
117.3k 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
Bain & Company
Bain Case: BeautyCo – Where Did the Profits Go?
4.5
54.8k 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(...)
Company case by
Bain & Company
Bain Case: Old Winery
4.3
141.1k times solved
Difficulty: Intermediate
Candidate-led
Growth strategy
Market analysis
Market sizing
Mergers & Acquisition
You have inherited the “Old Winery” from your grandfather, a winery that has been family-owned for five generations and(...)
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(...)
Case by
PrepLounge
REA Reinsurance
4.0
12.7k times solved
Difficulty: Advanced
Interviewer-led
Mergers & Acquisition
Your client, REA, is a reinsurance company.REA recently acquired another reinsurance company (approximatively same size)(...)
Your client, REA, is a reinsurance company.REA recently acquired another reinsurance company (approximatively same size): the choice of this company w(...)
Case by
PrepLounge
Bodybuilding Made Easy
4.0
11.3k times solved
Difficulty: Advanced
Candidate-led
Market analysis
Market entry
Market sizing
New product
Operations strategy
Your client is a newly founded protein company. Its owners are two brothers. One of them is a chemist and the other one(...)
Your client is a newly founded protein company. Its owners are two brothers. One of them is a chemist and the other one is a very famous fitness model(...)
Case by
PrepLounge
McKinsey Case: Digital & Vegan Restaurant Franchise
4.6
24.4k times solved
Difficulty: Intermediate
Interviewer-led
Market entry
Pricing
Valuation
Our client is a European venture capital firm. They are potentially interested in investing into a new restaurant franch(...)
Our client is a European venture capital firm. They are potentially interested in investing into a new restaurant franchise player from Austria, calle(...)
Case by
PrepLounge
Stripe IPO: Advanced Valuation Interview Questions for Finance
5.0
100+ times solved
Difficulty: Advanced
Interviewer-led
Mergers & Acquisition
Valuation
This set of questions focuses on IPO valuation using Stripe as an example. It tests your understanding of core valuation(...)
This set of questions focuses on IPO valuation using Stripe as an example. It tests your understanding of core valuation methods and your ability to a(...)
Case by
PrepLounge
Working Capital Forecasting at FreshHarvest AG
5.0
300+ times solved
Difficulty: Intermediate
Interviewer-led
Operations strategy
Valuation
You’re advising FreshHarvest AG, a fast-growing food distribution company based in Germany. They operate on tight margin(...)
You’re advising FreshHarvest AG, a fast-growing food distribution company based in Germany. They operate on tight margins, high volumes, and have rece(...)
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(...)
Expert case by
MBB - Climate Change Operations - Part 2
5.0
1.4k times solved
Difficulty: Intermediate
Candidate-led
Capacity change
Market analysis
Operations strategy
Restructuring
Sustainability
Note: If you have not already done so, first work through the 1st part of this case: https://www.preplounge.com/en/manag(...)
Note: If you have not already done so, first work through the 1st part of this case: https://www.preplounge.com/en/management-consulting-cases/candida(...)
Company case by
Oliver Wyman
Oliver Wyman Case: Full Electrons Ahead
4.4
135.5k 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
Pickup Manufacturer
4.1
7.8k times solved
Difficulty: Beginner
Interviewer-led
Market analysis
Profitability analysis
The automobile manufacturer CarsCo has difficulties with the profitability of its pick-up unit in Thailand. The candidat(...)
The automobile manufacturer CarsCo has difficulties with the profitability of its pick-up unit in Thailand. The candidate is supposed to evaluate the(...)
Expert case by
BCG + Bain - Vets2U - Healthcare Based Case WITH VIDEO SOLUTION
4.7
3.0k times solved
Difficulty: Intermediate
Candidate-led
Growth strategy
Health care
Market entry
New product
Profitability analysis
Our client, Vets2U, a well-established organization that runs ten Mobile Veterinary Clinics (MVC) in the US, has witness(...)
Our client, Vets2U, a well-established organization that runs ten Mobile Veterinary Clinics (MVC) in the US, has witnessed a concerning trend of stagn(...)
Company case by
Roland Berger
Roland Berger Case: Onlinestar
4.2
109.2k 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
Make Steakhouse Great Again!
4.4
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
Well Being health care
4.3
29.1k times solved
Difficulty: Intermediate
Interviewer-led
Capacity change
Growth strategy
Market analysis
Public sector
Your client is Well Being (WB), a private healthcare company based in Germany.  Well Being operates 10 hospitals in(...)
Your client is Well Being (WB), a private healthcare company based in Germany.  Well Being operates 10 hospitals in Germany (in comparison to 1,0(...)
Expert case by
BCG - YodaPhone
4.4
12.9k times solved
Difficulty: Intermediate
Candidate-led
Operations strategy
Our client is Yoda's Phones, a national telecommunications company. They have embarked on a three-year, multi-million do(...)
Our client is Yoda's Phones, a national telecommunications company. They have embarked on a three-year, multi-million dollar digitization program. Unf(...)
Expert case by
Grain Co-operative – Brand Launch
4.3
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
Italian Beauty Company
4.3
11.8k times solved
Difficulty: Intermediate
Interviewer-led
Market analysis
Profitability analysis
Your client is Italian Beauty Company (IBC), a high quality beauty products company. It is well established in Italy.One(...)
Your client is Italian Beauty Company (IBC), a high quality beauty products company. It is well established in Italy.One of their major product lines&(...)
Expert case by
MBB First Round - FastFashion - Customer Loyalty
4.5
900+ times solved
Difficulty: Advanced
Candidate-led
Non-conventional
FastFashion is a national retail chain in Australia that sells a variety of different clothing brands for men, women, an(...)
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 fo(...)

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. 🚀

Let's Move On With the Next Articles:

The Personal Fit Interview
General Info
The personal fit interview is a crucial part of the selection process in consulting. It’s often underestimated by candidates who tend to focus on(...)
The personal fit interview is a crucial part of the selection process in consulting. It’s often underestimated by candidates who tend to focus on the challenging cas(...)
To the article
Key Questions in the Personal Fit Interview
General Info
Consulting interviews are not just about your skills and knowledge — companies also want to see how well you align with their culture and values,(...)
Consulting interviews are not just about your skills and knowledge — companies also want to see how well you align with their culture and values, often called "perso(...)
To the article
Interviewer- vs. Candidate-Led Cases
General Info
Every case interview has a certain structure. An important factor on how your case interview is going to proceed is if the interview is interview(...)
Every case interview has a certain structure. An important factor on how your case interview is going to proceed is if the interview is interviewer-led or candidate-(...)
To the article