A suggestion:
1 - do a PPRuNe search on a) "first time pass rates" and b) another on "4 Forces"
2 - wait for the incoming (perhaps from from Oxford Blue, Send Clowns and Alex Whittingham) responses that might point out that 80% isn't the best & even if it were, there are other things to consider when making your choice, then...
3 - return to the result of 1b)
