metrics & object-oriented programming

i know somebody mostly uses metrics countenance the code/design.
as example, i cruise i use:

• number lines per slight (< 20)


• number variables per slight (< 7)


• number paremeters per slight (< 8)


• number methods per category (< 20)


• number domain per category (< 20)


• inheritance tree abyss (< 6).


• lack oncsensus methods

most metrics unequivocally simple.

what your slight kind mesure ? apparatus check (e.g. ndepend) ?