Abstract:   Recent high profile failures of avionics Lithium Ion battery systems and concentration on reduced design cycles seems to imply that there are still failure rates in aerospace programs. This paper is based on another written by Dr. Gregg Hobbs (the inventor of HALT and HASS) in 2002 pointing out field failure rates of aerospace programs that at the time were running in the 20-50% range on the systems level. The late Dr. Hobbs
predicted that as avionics systems became more complicated and the umber of subsystems on board increased, that the opportunity for defects would also increase. This, of course, causes a worsening of the general failure rate at a much higher cost to companies.

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