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Thepreliminarydesignphaseofanyprogramiskeyto
itseventualsuccessfuldevelopment.Themore
advancedadesignthemorethistendstobetrue.For
thisreasonthepreliminarydesignphaseisparticularly
importantinthedesignofaerospacesystems.Errorsin
preliminarydesigntendtobefundamentalandtendto
causeprogramstobeabandoned,ortobechanged
fundamentally,andatgreatcostlaterinthedesign
development.
[[i]本帖最后由dachqian于2007-8-2913:55编辑[/i]]
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