Not just 'stress safety' but all the other things. A NASA project I was related to we logged every single bolt that went on the device, where it came from, the

Not just 'stress safety' but all the other things. A NASA project I was related to we logged every single bolt that went on the device, where it came from, the batch number, and had to keep all the old software around in the event we had to reconstruct something. The amount of overhead was pretty amazing. Most of that is for safety.