Hello, I recently had an interview which I don't believe went too well. I was asked to size the market for medical ventilators and describe how I would forecast growth of this given market. I initially made assumptions about no of people possibly with respiratory problems, then no of people diagnosed, and then identified drivers such as advancements in tech that would drive growth year over year. Eager to hear other approaches. Thanks!
Schedule mock interviews on the Meeting Board, join the latest community discussions in our Consulting Q&A and find like-minded Interview Partners to connect and practice with!
Back to overview
10
Thanks for your comment Ian. So I did actually try to clarify, and interviewer simply said "it is a device that aids people with problems breathing"and wanted me to go bottom up style. He seemed to question my method of filtering the market, as opposed to my initial assumption, so I'm open to suggestions of how I might size the market in either case i.e. (respiratory device or life support device) Thanks!
Thanks for your comment Vlad. So I did actually try to clarify, and interviewer simply said "it is a device that aids people with problems breathing"and wanted me to go bottom up style. He seemed to question my method of filtering the market, as opposed to my initial assumption, so I'm open to suggestions of how I might size the market in this case, and then forecast it. Thanks!
For the calculation of annual pass holders, isn't it 60,000 passes, given that we assume that 600,000 visitors use their pass 10 times per season?
10
Market sizing
2
2.5k

Be the first to answer!
Nobody has responded to this question yet.
Top answer

Ian
on Jun 14, 2019
Coach
Top US BCG / MBB Coach - 5,000 sessions |Tech, Platinion, Big 4 | 9/9 personal interviews passed | 95% candidate success
Hi,
I may be misreading, but I think you made a major mistake here: Ventilators are used primarily for life support, not for people with respiratory issues.
I.e. lots of people have asthma (repsiratory problem), but an inhaler is more than sufficient for the vast majority.
Just like in a case, you need to make sure you understand the question. Clarify your assumptions about what a ventilator is and who would need it before jumping into the sizing blindly.
1 comment

Anonymous A
on Jun 14, 2019

Vlad
on Jun 14, 2019
Coach
McKinsey / Accenture Alum / Got all BIG3 offers / Harvard Business School
Hi,
I've no idea what's the medical ventilator is thus it's hard to help you with market sizing.
I assume you didn't ask the clarifying questions to understand more about the product and various use cases.
Best

Anonymous A
on Jun 14, 2019
Sign up for free to read all answers.
Sign up for free to read all answers.

Similar Questions
Most Popular Posts
BCG Dubai hardware
8
on Aug 26, 2025
Asia
3
200+

Top answer by
Hagen
Coach
#1 recommended coach | >95% success rate | 9+ years consulting, interviewing and coaching experience
3 Answers
200+ Views


What can I expect from McKinsey onboarding?
8
on Aug 27, 2025
USA
2
200+

Top answer by
Evelina
Coach
EY-Parthenon (7 years) l BCG offer holder l 7+ years coaching l 30% off first session l free 15' intro call l LBS
2 Answers
200+ Views

McK or ATK?
10
on Aug 27, 2025
DACH
8
1.0k

Top answer by
Pedro
Coach
30% discount in September | Experienced interviewer & consultant (+5 years) | ex-BCG | RWE
8 Answers
1.0k Views


+5
BCG Internship Interview Preparation in 7 Days - Taipei
9
on Aug 27, 2025
Asia
6
600+

Top answer by
Lukas
Coach
50% OFF on first 2 sessions | ~10yrs in consulting | ex-BCG Project Leader | Personalized prep & coaching | INSEAD MBA
6 Answers
600+ Views


+3
Question about
Case
on Aug 29, 2025
Global
2
400+

Top answer by
Evelina
Coach
EY-Parthenon (7 years) l BCG offer holder l 7+ years coaching l 30% off first session l free 15' intro call l LBS
2 Answers
400+ Views
