cobrachen, you are referring to the D. Herrmann book or the JaPo books?
I got the D. Herrmann book some time ago but did not find much time to really dive deeper into it, so I cannot say if it would be helpful concerning your questions;
www.spitfireperformance.com does have a nice article on Dora performance testing though;
maybe head there and see if this is useful for you...