How good is good enough?
There seems to be a range of opinions from "nothing to see - move along" through to "this warrants a formal investigation". How does one distinguish between "barely acceptable" and "good" flying skills - especially in airline service as distinct from in the simulator?
Are there objective measures?
What would you do about a "good" pilot who on one/two/three occasions falls far below normal standards?
Would a "barely acceptable" pilot eventually be considered for a command course so long as his/her performance never fell to "unacceptable"?