Originally Posted by
Pilotpip
I think more do something more easily distinguished. Something like last four digits of your SSN, birthdate, date of hire.
Kind of hard to assign seniority within a class by date of hire...
At TSA, we were ordered by the last four digits of our SSNs. At CHQ, it's by age. The vast majority of airlines use one of these two methods. Eagle I know is age, and I believe SKW is by SSN.