Person A, at work put in for Vacation Days (20 Oct 2012) asking for July 1-5 off.
Person B, at work put in for Vacation Days (12 Jan 2013) asking for July 6 -16 off.
On 29 Jan 2013, Person A Changed Dates to July 1-10.
On June 1, Persons C & D get put on probation and the over lap of Person As 1-10 and Person Bs 6-16 is going to cause a problem due to lack of workers.
Schedule guy says Hey Person B, I dont think your Vacation Days are gonna work, because Person As Days overlap your days.
Person B has a valid point, he is relocating his family over that time period for his deployment and Person A changed their dates after Person B went on Record with their dates.
Who Should get what Days off...
I suggested Person A can get 1-7 and Person B keeps 6-16. Since 4-7 is a Holiday 4 Day weekend.