"I've got a great idea.." someone at Airport Operations must have said ".. instead of accurately displaying whether a flight is delayed, about to board, boarding, closed and so on, let's just have a computer work out when that should happen, and display that."
"So, like, 40 minutes before a flight is scheduled to take off, let's display that it's boarding"
"Dunno; probably not, but let's do that anyway. And then, say, 30 minutes before the spreadsheet shows take off, let's show 'Final Call'
"Yes, it will"
"Yeah ... Fuck 'em"