Naming Strains

how many crosses do you guys make before you name a strain?

https://www.rollitup.org/t/f1-vs-f2-hybrids.44376/

https://www.thompson-morgan.com/f1-hybrid-what-is-it

http://www.mjguide.com/tutorials/Breeding/774.htm

if i breed an f1 what is the inbred line called? answer: f2 , f3, f4 , ibl
if i bred two f1 lines together is that an f2 ? yes
do f1 have phenotypes? answer maybe and they do not breed true. f2 have phenos and donot breed true.

is this system he best and most useful?

what if i get two separate phenotypes and breed each pheno as separate ibl ? then breed 2 separate ibl phenotypes together? that would be an f1 or an ibl still?

4- 8 generations to stabilize. or ibl whole time.