"Bob Noel" wrote

What are the failure modes of these components? How will failures
and errors be detected and handled? How will component changes
be handled? How much will it cost to repeat the appropriate analyses
when various vendors roll part numbers? How will you determine that
the part hasn't changed when the vendor didn't change the part number?
(Don't laugh, I've seen an LRU no longer work in a particular aircraft
when
a chipset vendor changed a production process which ever so slightly
changed functionality but the vendor didn't change the part number).

And do you have any concept of what it would take to put a commodity
OS like windows into a safety-critical application?
All this and more. .

How about the displays necessary to be bright enough for easy viewing in
very bright situations? They cost twice as much alone, as the computers in
the price range he is suggesting on using for running the applications.

How about the hard drives? They need to be able to handle high altitudes
without (what is the proper term, here? ) hard drive platter crashes? (the
readers above the platter scraping the platters, instead of floating on a
layer of air slightly above the platters)
--
Jim in NC