Hi,

1) Any uncertainty you have (e.g. b2b/b2c, units, timeframe, geographical scope etc). If it is part of the regular - it'll start as the regular case

2) You take a minute, make a structure and then you fill from the bottom in by asking for data / making assumptions

3) If it's a standalone case - you should be using more segmentations. If it is a part of the bigger case - should be using more 80/20, capacity / occupancy, peak / off-peak approaches

Here is more advice:

t's less about different types of the problems but rather about the tools that you use:

1) First of all, there are **2 ways to structure market sizing:**

- Formula - basically a math formula to come up with a solution. The problem with the formula is that it is easy to forget something or get lost.
- Tree - same as with regular cases you build a tree. A very simple example: you need to calculate the number of dogs on manhattan. A number of dogs = share of households having a dog * # of households. # of households = population / average household size. In the end, you'll have a pyramid where you have to fill the numbers on the base of the pyramid. This approach is much easier and help you track all the numbers

2) You should **learn the key market sizing techniques:**

- Making assumptions based on personal experiences (Use the example of your house where out of 100 apt-s 10 have dogs)
- Adjusting numbers (NY is a busy city thus fewer people have dogs)
- Sanity check - try to apply your calculations to the real environment
- etc.

3) You should **learn the key tools:**

- Using age even age split (suppose life expectancy is 80 years. Assuming even age split we have 4 mln people in US of each age)
- Using 80/20 split (suppose 20% people earn 80% wealth and the average salary is xx...)
- Using approximations (Length of NY-SF flight and plane speed to calculate US length)
- etc.

4) Learn **key numbers: **populations, gas price, gas consumption, Boeing speed and nmber of seats, average salary, # of gates in the airport, GDP growth rate, inflation, etc.

5) **Practice 10-15 cases** and you'll be fine. Almost all casebooks have good market sizing examples and the solutions

Feel free to PM for clarifications

Good Luck!

Hi,

1) Any uncertainty you have (e.g. b2b/b2c, units, timeframe, geographical scope etc). If it is part of the regular - it'll start as the regular case

2) You take a minute, make a structure and then you fill from the bottom in by asking for data / making assumptions

3) If it's a standalone case - you should be using more segmentations. If it is a part of the bigger case - should be using more 80/20, capacity / occupancy, peak / off-peak approaches

Here is more advice:

t's less about different types of the problems but rather about the tools that you use:

1) First of all, there are **2 ways to structure market sizing:**

- Formula - basically a math formula to come up with a solution. The problem with the formula is that it is easy to forget something or get lost.
- Tree - same as with regular cases you build a tree. A very simple example: you need to calculate the number of dogs on manhattan. A number of dogs = share of households having a dog * # of households. # of households = population / average household size. In the end, you'll have a pyramid where you have to fill the numbers on the base of the pyramid. This approach is much easier and help you track all the numbers

2) You should **learn the key market sizing techniques:**

- Making assumptions based on personal experiences (Use the example of your house where out of 100 apt-s 10 have dogs)
- Adjusting numbers (NY is a busy city thus fewer people have dogs)
- Sanity check - try to apply your calculations to the real environment
- etc.

3) You should **learn the key tools:**

- Using age even age split (suppose life expectancy is 80 years. Assuming even age split we have 4 mln people in US of each age)
- Using 80/20 split (suppose 20% people earn 80% wealth and the average salary is xx...)
- Using approximations (Length of NY-SF flight and plane speed to calculate US length)
- etc.

4) Learn **key numbers: **populations, gas price, gas consumption, Boeing speed and nmber of seats, average salary, # of gates in the airport, GDP growth rate, inflation, etc.

5) **Practice 10-15 cases** and you'll be fine. Almost all casebooks have good market sizing examples and the solutions

Feel free to PM for clarifications

Good Luck!