I came upon a question regarding market sizing:
Whenever there is a question like "how many schoolbuses/ commercial airplaines etc. are there in the USA?
I saw two ways of doing it:
a) easier way: the amount of students in the USA taking the school bus divided by how many students fit in a bus
b) harder way: how many rides are demanded a day (or month or year) divided by how much rides one bus offers a day (or month or year)
Preplounge generally suggests using the later one (demand = supply). However, often this takes too much time during a bigger case.
My question: where is the logically difference between the two?
Same for this question: how many airplaines are there in the US?
b) passengers/year divided by how many passengers one plane transports a year
a) Could we say: how many people are there in the US who use commercial airplaines divided by how many people fit in an airplaine (assuming 100 occupation) ?? Here we would have to assume the full capacity in the airplaine is used?
Thanks a lot,