I was going to say: An ideal spacecraft is not one in which everything is perfect, but one in which it gets hit by something unexpected, everything explodes, while all people manage to evacuate to some escape capsules, combine into a giant robot and save the universe (note anything after "combine" is optional as long as all people survive)

Was a fun read. Works well in software development, just know when to draw the line at ensure it works (people might not die due to our failure, unless you are writing pacemaker code)