Be careful about generalizing about Boeing here; it's not really a good example. The door plug incident was entirely caused by managers, not bad engineering.
In this case, the managers knew that if they went back and removed the door plug then it would have to be inspected again. That would cost time, and the plane was already behind schedule. Their bonuses were in the line, so they got together to find a solution. The solution that they found was to skirt the inspection rules using semantics. They decided to have their employees loosen the bolts, shift the door plug a little, do the required work, and then put everything back. This allowed them to claim with a straight face that they hadn't ”removed” the door plug, and therefore it didn't need to be inspected.
In this case, the managers knew that if they went back and removed the door plug then it would have to be inspected again. That would cost time, and the plane was already behind schedule. Their bonuses were in the line, so they got together to find a solution. The solution that they found was to skirt the inspection rules using semantics. They decided to have their employees loosen the bolts, shift the door plug a little, do the required work, and then put everything back. This allowed them to claim with a straight face that they hadn't ”removed” the door plug, and therefore it didn't need to be inspected.