Why don't you approach this problem the same way you are solving the cases? Find out in which part of the case you are slow and work on this exact problem
1) Presenting the structure. Based on my experience the major time-consuming factor is that candidates start providing the example of why they need a particular piece of information or providing too much explanation. Like: "This would help me determine if it makes sense to enter the market in the first place".
Instead simply say: In the market, I would like to look at the size, growth rate, segmentation, regulation. In the company, I would like to look at A,B,C,D
The major problem is that if you are providing the examples - you are stealing your own time and you will not be able to finish the case properly.
2) Being slow with math problems - Something that helped my candidates - download ALL casebooks available online and go through the math problems in the cases. They will give a good sense of required business terminology. Then you can google what you don't know.
P.S. don't follow the books solutions to solving the cases since they are not that good. Just practice the math problems
3) Being slow with calculations
Basically, you need to develop 3 calculation skills:
- Learn how to multiply double digit numbers (https://www.youtube.com/watch?v=6ndkkPZYJHo).
- Learn how to work with zeros. Best way - always use 10^power instead of zeros. Example: 300x9000 = 3*10ˆ2 x 9*10ˆ3=3x9*10ˆ(2+3)=27*10ˆ5. Handwritten it looks not that complicated. If you get used to writing all the numbers that way, you will never loose zeros and all multiplications/divisions will be replaced with + or -.
- Learn the division table up to 1/11 (i.e. 5/6 = 83.3%). It will help you calculate any percentage problems
- Use math tools to train (Preplounge tool, Mimir math for iOS, Math tool on Viktor Cheng website). Train, train, and train again
4) Guessing instead of structuring the problem (taking into account how many times you've mentioned "hypothesis" I believe you might be guessing instead of using the hypothesis correctly):
- It's not OK to take 30 seconds and then come up with just 1 or 2 ideas. And then if the ideas are not correct to keep the science again. This is called "Guessing"
- It's OK to take 30 seconds, draw a new structure (or continuation of your previous structure) and come up with a structured way to approach the problem further.
More on the hypothesis usage here: https://www.preplounge.com/en/consulting-forum/how-to-lead-with-your-hypothesis-2711