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Different approaches to prep case interviews efficiently & effectively?

acceleration of preparation
New answer on Aug 10, 2023
5 Answers
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Anonymous A asked on Aug 09, 2023

I am wondering what's the best mix of different approaches to prep case interviews efficiently & effectively. What I've been trying:

1. Regular case interviews with case partners

2. Drills to improve specific areas

3. Mimic best practices: listen to LOMS, check Youtube channel on live case interview

4. Read news, study industry knowledge

5. Read case books to understand how case is designed and tested; familiarize with common chart types / question. 

Does any of these don't make sense? What is the best time allocation among these different approaches?

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Cristian
Expert
Content Creator
replied on Aug 09, 2023
#1 rated MBB & McKinsey Coach

Hi there!

This is a great question. 

Where you put your effort makes a huge difference. 

In short, I'd focus mostly on 

  1. Individual practice 60%
    1. Practice full cases
    2. Do drills on the areas that you need to improve
    3. Mix methods: doing cases, listening to cases, watching cases
  2. Peer practice 30%
    1. Find 2-3 people that are actually good, reliable and give you good quality feedback and aim to meet with them at least once per week
  3. Coaching practice 10%
    1. Get a coach early in the process to figure out what you should be focusing on, what are your strengths and areas of development - this will make a critical difference

Don't invest time in LOMS (outdated) or in studying industry knowledge (interview tests for skills not knowledge - unless you're applying for an expert role). 

Best,
Cristian

 


 

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Anonymous A on Aug 09, 2023

Hi Cristian, thanks for the input - fresh insight and very useful! Interesting to know individual practice should be 60%. Most people nearly focus 80-100% on peer interviews. Can you clarify the "practice full case" part which is under the individual practice bucket? Does it mean practicing doing a new case by myself and timing myself? Or does it mean self-practicing / redoing a case I've done with case partners?

Cristian on Aug 09, 2023

Glad to hear you found it helpful! Basically, attempt full cases as if you were in the interview (once you have a basic understanding of what are the requirements from the interviewer). Read each question, attempt it on your own, then check with the answer in the case book. Don't take the answer in the case book to mean the absolute truth. Rather think how you could use it to make your better. Then after each case take some time and reflect on what went well in the case, what didn't, why and what you could do about it. Best, Cristian

Benjamin
Expert
Content Creator
replied on Aug 09, 2023
Ex-BCG Principal | 8+ years consulting experience in SEA | BCG top interviewer & top performer

Hi,

I second what Cristian has mentioned. I'd like to add 2 other nuances and important considerations:

  1. On point #1 regular  case practice with partners: when doing this the most critical thing is to get quality feedback is 
    • The risk otherwise is that you don't know where you went wrong and/or in a worse case scenario get feedback that is not optimal/correct
  2. On point #5: To understand how the case is designed and tested, the best way to do this is to actually speak to experienced consultants and current/previous interviewers
    • Not only are interviewers actually the ones who have sat on the other side of the table, but because the skills tested are the ones required on the job, typically these individuals would have a deep understanding of the requirements

Lastly, I would suggest that you try point #2 with partners as well - this often can be very helpful if done right.

All the best!

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Sophia
Expert
replied on Aug 09, 2023
Top-Ranked Coach on PrepLounge for 3 years| 6+ years of coaching

Hello,

I would say that it depends on what stage you are at in the casing process.

For a total beginner, I would recommend starting with #5 and #3, to familiarize yourself with what a case interview is, see some basic structures and frameworks, and understand what a good performance looks like.

As soon as you have more or less grasped the logistics of the case interview, the vast majority of your attention should be devoted to #1 and #2. There's really nothing beating live case practice (with a friend, case partner, or coach) in terms of interview prep, since it's the best way you are going to be able to mimic the case interview environment. I would focus most of your attention here. After doing some live cases, reflect on the feedback, and do drills focusing on specific areas that you need to improve.

#4 is a nice bonus that is helpful for background business knowledge, but its more of an addition than a substitute for interview prep. 

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Ian
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Content Creator
replied on Aug 10, 2023
#1 BCG coach | MBB | Tier 2 | Digital, Tech, Platinion | 100% personal success rate (8/8) | 95% candidate success rate

Hi there,

It depends on the individual.

It's like asking a forum how to lose weight or get fit. Different things work for different people.

In general, I find that just reading a ton of casebooks (point #5) has rapidly diminishing returns. As in, once you hit intermediate stage, you should focus more on live peer casing.

Additionally, remember that how you do this prep and what resources you use affects a lot too!

But, in general, your 1-5 list is about right.

Here's some more reading to help:

https://www.preplounge.com/en/articles/pitfalls-case-interview-preparation

 

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Sidi
Expert
replied on Aug 10, 2023
McKinsey Senior EM & BCG Consultant | Interviewer at McK & BCG for 7 years | Coached 350+ candidates secure MBB offers

Hi! The MOST important thing is to first get the fundamentals right. If you fail in this, all other points will have close to zero positive impact. For this, your best bet is to identify a person with actual experience as an interviewer at a top firm (not one of the countless ex Analysts who will just repeat the stuff from case books to you). 

I think your list is a little bit problematic. 

For example, on point #3, LOMS is for sure NOT best practice. :) 

And on point #4, this is more or less irrelevant, because top strategy consulting firms will not base their hiring decisions on whether you have KNOWLEDGE about specific business areas (they generater their knowledge through internal processes. They don't need to hire it from candidates!), but based on whether you are an outstanding PROBLEM SOLVER. If this is the case, then your industry knowledge is next to irrelevant. But again - this is a METHODICAL skill that you need to build and learn from someone competent. No MBB is interested in your memorization skills.

Point #5 is also problematic in the way you position it. Case books can be useful in terms of getting case prompts, data and exhibits. But they are almost always abysmally bad as soon as you look at the “solutions”, which lack rigor and have almost never been created by people who did real interveiwer training within MBB. Easily 90% of case book solutions that I have seen would most certainly lead to rejection at the top firms, since they just randomly list "buckets" without a sound logic, and the “right” questions just magically fall from the sky.

 

In summary: Do your research and identify someone with real competence who can guide you and who can also help you with the time planning. Proper preparation might require from a few weeks up to several months - depending on your starting point.

Hope this helps.

Cheers, Sidi

_______________________

Dr. Sidi Koné 

(Former Senior Engagement Manager and Interviewer at McKinsey | Former Senior Consultant and Interviewer at BCG)

 

 

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Cristian

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