[javier123454321]

If you just look at the plans in the initial diagram. Plan C is the only one that makes marginally useful spaces, avoiding excesive corners and awkward leftover space that ends up without use. It also happens to be the more obvious solution to the problem.

I could see the value in generating a bunch of rooms roughly accounting for the space requirements, but that's usually done in a more abstract way before taking into consideration things like privacy, thoroughfares, building conventions, spans, noise and light access, wind patterns, and things of that nature.