Ok.. and the relative correct/incorrect design elements proportion in the Shuttle's case is? Cumulatively for all the things the Shuttle's done/been put through? It's probably one of the most complex machines ever made.
The point I was making was that it's a design project that's pretty much on the front of humanity's present technological progress.. It's not a backyard amateur project with little QC, or a product whose makers consciously skimp on QC for profit (like Windows). It's also a project that's not as complex or put through as extreme conditions as the Shuttle, so that the risk is much lesser.
