Hi!

Well, this is a funny definition of Market Size anyway. Market size normally refers to the volume of transactions/sales/customers over a defined time frame (e.g., a year). But it is NOT the total number of items that are in use. So to me it seems that this case has been devised by a person which has a very shallow understanding of business mechanics.

Unfortunately, this is quite common in case books. Therefore I am very clear to mentees on the following point:

Studying Case Book solutions is a colossal waste of time - and very often it is even harmful!

They can well use the cases for practicing, but the solutions provided in the boos should be ignored. Once my mentees have learned how to properly think through strategic issues, their own approaches are usually far better and more robust than the book solutions anyway.

Cheers, Sidi