I wouldn't be so quick. Date of hire or similar should be the only criteria for a seniority list, unless merged where it's up to the unions to battle it out. As soon as you start entering merit into it...that's a pandora's box and you will forever and ever relegate the carrier into banana republic territory. It's like an Anal Oscar...upgrade for the rectal athletes able to crawl through the bowels of management and tickle the tonsils of the decision makers. That's the positive side, but what if you have to cull? Our assassination squad moved in and cleansed the fleet based on 'merit'. One fella had less than 6 weeks to retirement...it's hard to explain it to a wife whose husband was purged on account of someone who is lower on the totem pole but has merit.