wrote:
I've seen a lot of EFIS electronic displays for Homebuilts, that are not certified for
use in production aircraft. I build this sort of electronics for a living and
there is a world of difference between make it look like it works and make it robust
under all circumstances in the real world.

Oh, so it's based on a feeling instead of evidence? Gotcha.

BTW, at which point during the certification paperwork does the
robustness get installed?

Thanks!