McKinsey / Accenture / Got all BIG3 offers / More than 300 real MBB cases / Harvard Business School
Book a coaching

Do you get extra "points" for getting an answer quickly in a market sizing/guestimate question?

Anonymous A

For example: How many petrol stations are there in the UK?

Surely the quickest way is:

1) Make an assumption of how many stations serve your home city's population (say 10 for 300,000 people)

2) That means 1 station serves around 30,000 people.

3) Get the total population of the UK approx. 60m, divide by 30,000 = 2000

4) Then adjust for areas with more service stations London, Birmingham etc

Vlad replied on 09/14/2018
McKinsey / Accenture / Got all BIG3 offers / More than 300 real MBB cases / Harvard Business School

Hi,

Depends on how you got the market sizing question. There are 2 options:

  1. Market sizing in the middle of the case. Here you really need to calculate something really quickly. However, the way you've done it in the example is too quick and you'll get no additional points for this. Although it won't be a negative score. The interview may just ask you for other ways to do it.
  2. Market sizing as a standalone case / market sizing right at the beginning of the case. In that case, you'll score negative points, since your solution is probably too fast. However, you can mention that there are two approaches and you can use them to triangulate your answer. Knowing several ways to do the market sizing can definitely add the points.

Best

Best!

Related BootCamp article(s)

Getting Up to Speed

In order to repeatedly demonstrate prerequisite skills under the pressure of a real case interview, you need to learn the basics and practice cases.

3 Comment(s)

Market Sizing

Market Sizing Cases are used to test your quantitative and reasoning skills. The interviewer evaluates your structure, numbers-handling and business sense.

16 Comment(s)

Interviewer-Led vs Candidate-Led cases

Case Interviews can be led by the candidate or by the interviewer: In Candidate-led cases the main challenge is the structure. In Interviewer-led cases the main challenge is to adapt quickly

0 Comment(s)

Important Facts

It's essential to know some key figures regarding geographies, population, economies for your case interviews. We summarized them for you here.

9 Comment(s)

Related case(s)

Bain case: Asian lubricants producer

Solved 66.4k times
4.7 5 25975
| Rating: (4.7 / 5.0)

LubricantsCo, a very successful Asian premium producer of lubricants in their native region, would like to further increase their revenue and profit. The product range ranges from lubricants in the automotive sector (e.g. motor and gear oil) to industrial applications (e.g. fats, heavy-duty oils). ... Open whole case

Your client, large automotive OEM WyCar, has developed its first fully electric vehicle (EV) and introduced it as a pilot on the Austrian market last year. However, sales have been far below the expected numbers. The management has engaged you to support them in understanding the reasons and advise ... Open whole case

Bain Case: Old Winery

Solved 8.1k times
4.4 5 215
| Rating: (4.4 / 5.0)

You have inherited the “Old Winery” from your grandfather, a winery which has been family owned for five generations and can be dated back to the 16th century. Half of the eleven hectares are used to grow white grapes, the other half to grow red grapes. They are grown in the conventional way, i.e ... Open whole case

Onlinestar, an online retailer of furniture and garden products (core business), has grown significantly in recent years as a result of an expansion of its product portfolio. The company mainly imports goods from Chinese manufacturers but also operates its own production of cat lavatories (special b ... Open whole case

Nutripremium

Solved 37.9k times
4.5 5 1115
| Rating: (4.5 / 5.0) |

Nutripremium is a very well-known premium nutrition food company in Europe (€1 billion revenue last year). It is based in Spain and has an excellent market share not only in its home country but also in Portugal, France, Italy and Germany. Nutripremium has two main lines of products: Vitam ... Open whole case