When I say "audit" I mean both airlines I have worked for have had guys from different fleets/management positions or external guys come and sit on the jumpseat and in the sim and watch what was going on.
On the line, they looked for both procedural compliance and areas of procedural weakness. That's more what I was getting at. What the report doesn't say is what the other AC fleets did for NPAs - was this an airline wide practice or just the Airbus fleet?