Schedule Change
-segment status(history)
-SC/WK/UN
-30 mins applicable for departure /arrival
-OPTION: cancel/rebook


IRROPS( within 48 hours)
-flight status(fli-fo)
-cancelled, diverted, delayed
-30 mins applicable for arrival
-65 mins on individual flights

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CONTROLLABILITY:

Controllable	
-Maintenance
-Crew delay
-Aircraft damage
-Customer and baggage delays
-Diversions, regardless of cause, at diversion station

Uncontrollable
-Airport facilities issues
-Airport security issues
-Customs and immigration
-National security issues
-Non-UA/UAX strike/work action
-Weather, including ATC delays and cancelations

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