Its a machine that is extremely mass limited, has many different groups of people influencing different systems, and is extremely complex. If the HARD requirem

Its a machine that is extremely mass limited, has many different groups of people influencing different systems, and is extremely complex. If the HARD requirement is "you have this much mass and volume to make a thing to a particular confidence score" you make the damn thing and hope you are on the correct side of the dice. No single engineer gives a shit about the entire system because no single person is equipped with the human ability of comprehending each individual part that has whatever confidence rating that is required.