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Top-down or bottom-up chart interpretation

How to Interpret Charts and Data in Consulting Case Interviews
New answer on Jul 31, 2023
8 Answers
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Anonymous asked on Apr 04, 2023

Hi there,

The article suggests to first communicate level 1, then level 2, then level 3 insights from a given chart. 

Why not turn it around and make it more top-down? 

I.e., first state “This chart suggests that customers may be changing preferences and moving away from the premium segment, so I'd like to look at our client's revenue development next” (level 3). Then: “The reason for my conclusion is that the premium segment is growing at the slowest rate compared to the others” (level 2), and so on…

Looking forward to any thoughts on this!

David

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Hagen
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replied on Apr 05, 2023
#1 Bain coach | >95% success rate | interviewer for 8+ years | mentor and coach for 7+ years

Hi there,

I think this is an interesting question that may be relevant for many people. I would be happy to share my thoughts on it:

  • First of all, and contrary to what other coaches have said, chances are high that communicating the exhibit analysis in the opposite order (i.e., implications, insights, and then description) will irritate the interviewer. As such, I would highly advise you not to communicate the exhibit analysis this way.
  • Moreover, if you communicate the exhibit analysis like this, the interviewer cannot follow your rationale right from the beginning, but instead needs to wait until the end of the description to then mentally trace your rationale, making it overly difficult.
  • Lastly, in case you misunderstand the exhibit right from the beginning, the interviewer will have no possibility to comment on your description of the exhibit and thus help you adjust insights and implications accordingly.

If you would like a more detailed discussion on how to best prepare for your upcoming interviews, please don't hesitate to contact me directly.

Best,

Hagen

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Ian
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replied on Apr 04, 2023
#1 BCG coach | MBB | Tier 2 | Digital, Tech, Platinion | 100% personal success rate (8/8) | 95% candidate success rate

Hi David,

From a quick glance I don't see a problem with how you are communicating it!

Ultimately, if you communicate clearly, concisely, and in the context of the objective/question then you are doing well! You have done that in your above example.

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Andreas
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replied on Apr 05, 2023
McKinsey EM | Top MBB Coach | >70% Success Rate | Free Introductory Calls

Hi there, 

when getting a complex chart, I would suggest to do the following. Take a moment to process the data & ask questions to interviewer, summarize intersting observations you make, bring observations together to get to insights & recommendation. If the chart is super complex it is best to not look at numbers first but at proportions, etc. Running numbers might lead you into a rabbit whole if you have not understood the big picture first.

Andreas

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Cristian
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replied on Jul 31, 2023
#1 rated MBB & McKinsey Coach
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Moritz
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replied on Apr 05, 2023
ex-McKinsey EM & Interviewer | 7/8 offer rate for 4+ sessions | 90min sessions with FREE exercises & videos

Hi there,

Top down only works if you're actually clear about the ‘bottom’. However, when doing chart analysis, this is often not the case yet because you're exploring as you're talking. Here's my advice:

  • Step 1: Talk briefly about the obvious insights - this will impress nobody but is important for your own understanding and buys you a little time
  • Step 2: Identify opportunities to show your quant skills - almost all exhibits have ‘hidden’ insights that can only be uncovered by crunching numbers
  • Step 3: Execute math where simple and/or align with interviewer for more complex computations that take a moment - explain why you're doing this
  • Step 4: Contextualize your insights with the data points from the case so far i.e., backward looking, and also suggest the relevance going forward

Hope this helps a bit. Best of luck!

Moritz

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Pedro
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updated an answer on Apr 06, 2023
Bain | Roland Berger | EY-Parthenon | Mentoring Approach | 30% off first 10 sessions in May| Market Sizing | DARDEN MBA

In my opinion, you are 1000% correct. 

Always go top down. Always!!!

Observations and insights are irrelevant if they are not leading to a recommendation or solving the specific problem. If they are not tied up to the case objective, they are just “random (and irrelevant) interesting facts”. Bain calls this being “answer-first”.

Moreover, top down communication, particularly when analyzing a chart is much more effective from a time management point of view. You only focus on what is important and you convey immediately WHY it is important.

You are communicating as CEOs (and consultants) want you to communicate. You start with the answer upfront, and then provide your arguments. As such, the consultant/CEO can analyze your arguments already knowing where it leads to. 

If you go bottom-up, the interviewers have no idea where you are heading to (and most likely you don't know as well). Worse, if you start with observations you are basically telling them what they already know. They don't need your help to read slides. They need your help to draw insights and provide recommendations based on them.

This is actually the MOST IMPORTANT rule to follow when looking at exhibits. You first think about the case goal, and then look at the exhibit to understand how it impacts the recommendation. If you are going bottom up, it is VERY UNLIKELY that you will follow this thought process. Once again: always be “ANSWER FIRST”. Particularly for Bain interviews, this is a MUST.

Of course, other may have a different opinion, but I am quite adamant on this one. Top-Down!

(edited)

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Emily
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replied on Apr 10, 2023
Ex McKinsey EM & interviewer (5 yrs) USA & UK| Coached / interviewed 300 +|Free 15 min intro| Stanford MBA|Non-trad

Great question! 

So generally McKinsey and other interviewer-led companies love it if you go top-down. They expect you to take some time to look at the chart before giving an answer and if you can do it this way up it's a large bonus. 

Interviewee-led interviews expect you to go level one and up. This is because they expect you to talk through the chart as you're analysing it and so it's more natural that you'll get the smaller insights first and then work your way up. 

Good luck!

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Andi
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replied on Apr 06, 2023
BCG 1st & Final Round interviewer | Personalized prep with >95% success rate | 7yrs coaching | #1 for Experienced Hires

Hi there,

Chart interpretation should always be done in a top-down manner, where you address the actual question / reason why you're looking at the chart first.

Contrary to some comments and beliefs here, please don't provide random insights just for the sake of it, esp if unrelated to the actual question, just to “show off” your quant skills. That's not going anywhere. 

Instead, focus on answering the question, add supporting evidence, use hyphoseses where helpful and be clear on the next steps to push the case further. Interviewers appreciate control over the narrative and action-bias.

Hope this helps - if you'd like to learn more on how to effectively interpret charts in any type of scenario, feel free to reach out via PM.

Regards, Andi

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Hagen gave the best answer

Hagen

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