Number of mattresses in KSA

Hotels and hospitals will be less than 20% of the total number, so it's fine to use use simplified assumptions (as per Udayans comment). But you should focus on being a bit more granular on the 80% of the general population.

E.g. some people keep them for longer… kids replace mattresses more frequently, etc… 

Also households is not the right driver. The number of mattresses depends on number of people (sleapling alone or in couples, and this depends mostly on age) not on households. Also some people have multiple homes… which mean multiple beds. Same thing on having rooms for visitors. 

So you are missing a lot of the complexity of the question.

Hospital beds are usually taken as a fraction of people (1 bed per thousand people for example) as you don't typically need many beds at once. For other businesses (e.g., hotels) you can use a multiple - for example total demand put together is 25% of household demand and this includes all of hospitality and say educational institutions, military etc. You will need to justify the reasoning for why you choose a particular number.

Hi there,

First of all, you've oversimplified the Households portion. You should segment by income.

Second, in terms of beds at Hotels (business/hospitals will be negligible) you can do either of the following:

1) Take a % factor (around 20%) of the Households answer

2) Split pop by Biz travelers and holidayers. Figure out how much each travels (i.e. # of weeks) and therefore number of beds needed. Consider occupancy rates as well (i.e. there will be x % more beds than needed)