Schedule mock interviews on the Meeting Board, join the latest community discussions in our Consulting Q&A and find like-minded Case Partners to connect and practice with!
Back to overview

CraftingCases: Hypothesis Testing (Case Interview Fundamentals Course)?

Hi there! 

I have been going through the Case Interview Fundamentals of CraftingCases. For the Hypothesis Testing section I was not able to follow properly. It seemed quite random how they were able to get from an interview question to a hypothesis using the "cause, effect, consequence" framework. Did anyone do this course and can help explain a way to come up with answers?

So in the example below, how do you get from "make or buy" question to the "cause, effect, consequence" content? 

Example: 

You said, at some point during your framework presentation,
"I’d need to test whether it would make sense for Oracle to buy SoftSales for their software vs. developing its own similar product."
The interviewer then interrupted you: "That’s interesting — how would you figure that out?"

4 Answers
400+ Views
52
Be the first to answer!
Nobody has responded to this question yet.
Top answer
Hagen
Coach
on Sep 19, 2024
#1 recommended coach | >95% success rate | most experience in consulting, interviewing, and coaching

Hi there,

I would be happy to share my thoughts on your question:

  • First of all, I would advise you not to focus too much on CraftingCases (or any other theoretical resource) for developing your initial structure. While they might sound good on paper, in most interview situations, you simply don’t have the time to follow such elaborate methodologies.
  • Moreover, I would advise you to consider working with an experienced coach like me on this. I developed the “Case Structuring Program” to help exactly such candidates like you who struggle with properly structuring any case study.

You can find more on this topic here: How to succeed in the final interview round.

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

Alessa
Coach
on Sep 19, 2024
xMcKinsey & Company | xBCG | +200 individual & group coachings | feel free to schedule a 15 min intro call for free

Hey! Actually, I also had a look at Crafting Cases before my interview prep some years ago :) 

In hypothesis-driven problem-solving, like the example you mentioned from the CraftingCases course, using a structured framework helps you break down the problem logically. The "cause, effect, consequence" framework is a way to systematically address a question, helping you articulate your thinking and ensure you're exploring relevant factors.

Here's how you could approach the "make or buy" question using the cause, effect, consequence framework:

1. Hypothesis:

The question asks if it would make sense for Oracle to buy SoftSales or develop its own product (make). Your initial hypothesis could be: "Oracle should buy SoftSales because it would be faster and cheaper than developing a new product."

2. Cause: Why might this be true or not true? (Analyze the key drivers)

  • Cause 1: Speed:
    • Buying SoftSales might allow Oracle to bring a product to market faster.
    • Developing in-house might take longer due to R&D, testing, etc.
  • Cause 2: Cost:
    • The cost of acquiring SoftSales versus developing a similar product (consider acquisition price vs. development costs, opportunity cost, etc.).
  • Cause 3: Synergies:
    • How well SoftSales’ product integrate with Oracle’s existing offerings (potential synergies or duplication of efforts).
    • Compare synergies from buying SoftSales with the potential advantages of making their own product.

3. Effect: What would the impact of each cause be?

  • Effect 1 (Speed):
    • Buying SoftSales allows Oracle to gain market share more quickly, which could lead to a competitive advantage.
    • Delays in developing in-house could result in missed opportunities or falling behind competitors.
  • Effect 2 (Cost):
    • If buying SoftSales is cheaper (due to lower R&D costs or quicker return on investment), it could be more attractive.
    • On the other hand, if SoftSales is too expensive, in-house development could be a better long-term solution.
  • Effect 3 (Synergies):
    • Better integration with Oracle’s existing products could lead to enhanced value for customers, while making their own could offer more control and customization.

4. Consequence: What does this mean for the overall decision?

  • If buying SoftSales is faster, cheaper, and provides better integration, the consequence is that buying makes more sense.
  • If the opposite is true (e.g., SoftSales is too expensive or doesn't integrate well), the consequence might lead to developing in-house.

In Short:

You break down the initial hypothesis (buy vs. make) by looking at causes (speed, cost, synergies), then think through their effects on Oracle’s goals, and finally derive the consequences to make a decision. This approach ensures you're logically progressing through the problem, analyzing each step, and justifying your conclusion.

In this case, when the interviewer asks "how would you figure that out?", you'd walk them through the analysis:

  • "First, I'd compare the speed of entering the market through acquisition versus development."
  • "Next, I'd evaluate the cost of both options, including R&D for in-house development and the acquisition price of SoftSales."
  • "Finally, I'd assess how well SoftSales' product integrates with Oracle’s offerings and whether developing their own would offer more strategic control."

Hope this helps!

BR Alessa

Fathu
Coach
on Sep 20, 2024
Ex-BCG Europe/ME/Africa | 50+ offers from MBB, Kearney, OW | Personalized coaching | Free 15-min intro call

Hello there,

Your specific question has been addressed and I thought to add a note on using Crafting Cases.

I studied the course a while ago and it’s a really great resource to get under the hood of a lot of structuring techniques. However, there are 3 risks you need to be on the lookout for:

  1. Verbosity: Based on their approach, you could end up using a lot of words to express points that could be stated more concisely  
  2. Loss of time: Their optimization for rigour over pragmatism in every exercise / sub exercise could waste precious time especially in smaller exercises in the middle of a case (e.g. brainstorming)
  3. Tendency to come across as robotic: This is more of a consequence of point 2 (so not perfectly MECE 🙂). When you spend a lot of time on smaller exercises just to be structured, it could dampen your fluidity when conversing with the interviewer

Feel free to reach out for a brief chat if you have any specific questions on how best to use the course.

Fathu

Pedro
Coach
on Sep 29, 2024
Bain | EY-Parthenon | Private Equity | Market Estimates | Fit Interview

Honestly... the structure should be: "compare the 2 options" on the "decision drivers".

You have 3 decision drivers:

  • Time to Market
  • Quality
  • Cost

[I'm using their content here... You could think about a few more drivers... Differentiation, development costs for further versions, capability preservation, etc.]

You have 2 options: 

  • "DYI"
  • "Outsource". 

Approach is to compare the 2 options on the 3 decision drivers.

They have a structure... but they don't have an approach nor are solving the problem. It is completely artificial and as such... useless at best.

Similar Questions
Consulting
How to prepare for a presentation-case-interview?
on Apr 25, 2024
Global
6 Answers
4.3k Views
Top answer by
Dennis
Coach
Roland Berger|Project Manager and Recruiter|7+ years of consulting experience in USA and Europe
248
6 Answers
4.3k Views
+3
Consulting
Has anyone tried any of the AI Interview Tools for MBB before?
on Sep 28, 2024
Global
8 Answers
5.3k Views
Top answer by
Iman
Coach
Systemiq | Ex-BCG | 10 years experience with 8+ specialising in sustainability | Free Intro | Ex-PrepLounge candidate
322
8 Answers
5.3k Views
+5
Consulting
Revolut Case interview
on Jul 31, 2024
Global
3 Answers
6.2k Views
Top answer by
#1 rated MBB & McKinsey Coach
342
3 Answers
6.2k Views
How likely are you to recommend us to a friend or fellow student?
0 = Not likely
10 = Very likely
You are a true consultant! Thank you for consulting us on how to make PrepLounge even better!