> The 
> argument that 
> the same risk was flown before without failure is often 
> accepted as an 
> argument for the safety of accepting it again. Because of 
> this, obvious 
> weaknesses are accepted again and again, sometimes without a 
> sufficiently 
> serious attempt to remedy them, or to delay a flight because of their 
> continued presence.

Note that the failure of the first Ariane 5 was caused by using software
that was space proven (but on another rocket!) instead of writing new
software (even testing with the new rpcket parameters was not deemed
necessarry, because the software was space-proven!).

Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu
 

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