All signs point to Boeing completely ignoring quality. There apparently isn't a record of the door plug being removed that was never reinstalled properly. Boeing put out a sound clip accepting responsibility but they have no record of ever removing the plug? Even a cursory glance at their protocols and they are shockingly deficient. If you "remove" the door plug, it needs to be inspected after reinstall. If you "open" the door plug, no inspection is required. Guess what the difference is between those two operations in practice? Nothing. Boeing fought to make sure door plugs were not "removed", they were only "opened" to avoid a life-safety critical inspection.
EDIT:
FAA reviewed 89 aspects of production and Boeing failed 33 of them. Not surprising given what we know but still appalling.
Boeing promises changes after getting poor grades in a government audit of manufacturing quality
Responding to a U.S. government audit, Boeing said Tuesday that it would work with employees found to have violated company manufacturing procedures to make sure they understand instructions for their jobs.www.ctvnews.ca
Shouldn’t the first step in the hiring process be asking if the applicant knows parts shouldn’t fall off airplanes.
Second question: Do they know how gravity works?
If they need a refresher course they’re in the wrong job.