My Top 15 Interviewer Led Cases

Not all cases are made equal. We’ve all done a million of those profitability decline cases but here is a list of the cases that are unique, strange, mind expanding, and that you’ve probably never done before.

My suggestion is, if you’re new don’t start with these because they’re all on the very difficult side. However, if you have a bit more experience I’d focus on trying to do all of these.

If you want access to the casebooks click the Links tab on the top of this page and there’s a few websites where you can find all of these casebooks.

1. Retail Bank (Ross 2011 Case # 1)

Industry: Financial Services

Skills Tested: Quantitative

Why I Like It: This case is the granddaddy of all quantitative cases. If you’re weak on reading graphs, setting up calculations, and doing math quickly and efficiently this is the case for you.

2. Acme Gas (Ross 2009 Case # 1)

Industry: Energy

Skills Tested: Quantitative, Structuring

Why I Like It: This case is full of hairpin twists and turns. To crack it you need to be strong on both the quantitative side and also be sufficiently broad in your thinking to structure the case in a MECE way.

3. Electronics Manufacturer (The Exotic Cases Casebook Case # 6)

Industry: Telecommunications

Skills Tested: Qualitative, Brainstorming, Structuring, Data Analysis

Why I Like It: This case requires you to pull insights from a really strange set of data, it’ll really help you if you struggle with this.

4. Grocery Chain (Ross 2008 Case # 10)

Industry: Retail

Skills Tested: Brainstorming, Structuring, Qualitative

Why I Like It: This is one of those cases that you can do multiple times and it still seems fresh (ask me how I know!) It’s great for expanding your qualitative prowess.

5. Granite Investments (Ross 2007 Case # 4)

Industry: IT

Skills Tested: Brainstorming, Structuring, Qualitative, Quantitative

Why I Like It: IT outsourcing was a little bit of a black box to me before I did this case. However, this case gives you a great introduction to the subject and is very good on both the qualitative and quantitative side.

6. HeartCorp (Columbia 2006 Case # 10)

Industry: Medical Devices

Skills Tested: Brainstorming, Structuring, Qualitative, Quantitative

Why I Like It: This case is excellent on the quantitative side because it tests your ability to set up algebraic expressions (many people struggle with this). On the qualitative side it forces you to think about the problem from many angles.

7. UPS in Italy (Columbia 2007 Case # 3)

Industry: Logistics

Skills Tested: Brainstorming, Structuring, Qualitative, Quantitative

Why I Like It: This case has a great quantitative section combined with a bunch of fun brainstorming.

8. Uganda Blackouts (Duke 2012 Case # 16)

Industry: Energy

Skills Tested: Brainstorming, Structuring, Qualitative

Why I Like It: This case was set in a very different context than I’m used to. It’s great practice for the curveballs you may get in an actual interview.

9. Happy Health Care (London Business School 2006 Case # 15)

Industry: Health Care

Skills Tested: Brainstorming, Structuring, Qualitative

Why I Like It: This is an amazing qualitative case because it starts from an industry analysis and then you have to drill down to the client’s problem.

10. Apollo Medical Labs (McCombs 2007 Case # 2)

Industry: Medical Testing

Skills Tested: Brainstorming, Structuring, Qualitative, Quantitative

Why I Like It: The quantitative portion of this case is extremely difficult. Ask the interviewer for help 🙂

11. Town Mayor (McCombs 2008 Case # 6)

Industry: Politics

Skills Tested: Brainstorming, Structuring, Qualitative, Quantitative

Why I Like It: This case is incredible because you have to look at it from the politics angle, the business angle, and the economics angle — really good practice!

12. GoNet (Kellogg 2011 Case # 2)

Industry: Technology

Skills Tested:  Quantitative

Why I Like It: This case is purely quantitative; do it if you need extra practice!

13. Organ Donation (Darden 2012 Case # 3)

Industry: Public Sector

Skills Tested:  Brainstorming, Structuring, Qualitative, Quantitative

Why I Like It: The quantitative portion of this case is really good because you have to set up a particularly difficult equation. The qualitative part is also interesting since it’s focused on public sector / nonprofit work.

14. Machine Company (Darden 2012 Case # 18)

Industry: Manufacturing

Skills Tested:  Brainstorming, Structuring, Qualitative, Quantitative

Why I Like It: This is the classic market entry case with a bunch of twists and turns.

15. Africa Cell (Unknown)

Industry: Telecommunications

Skills Tested:  Brainstorming, Structuring, Qualitative, Quantitative

Why I Like It: This is one of the most complex cases I’ve ever seen. If you want to learn something about emerging markets this is the case to do. Unfortunately I’m not sure which casebook to find it in.

16. JT’s Energy Drinks (Unknown)

Industry: Consumer Packaged Goods

Skills Tested:  Brainstorming, Structuring, Qualitative, Quantitative

Why I Like It: This is an excellent market entry case that has a great blend of the qualitative and quantitative. Unfortunately I don’t know what casebook to find it in.

Honorable Mentions:

1. Diconsa, Electro-Light, GlobaPharm, National Education Transformation (from Main McKinsey website)

2. Great Burger (from McKinsey Expert Network website)

3. Magna Health (from McKinsey Expert Network website)

Hope it helps!

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