Re: "So why do we need a change control tracking system again?"
Back in the days of Apollo 13, and fior quite a few years after, didn't lots of high-value high-tech stuff (components, equipment, etc) have an ECO/FCO record **on the item itself**?
Gear gets an ECO/FCO, ECO/FCO label is updated, if the ECO/FCO don't show, the flight doesn't go (and vice versa). (NB this wasn't just for stuff that flies).
I'm not misremembering the principle.
Biting the hand that feeds IT
