Agree with Bridogger6 mostly cuz just asked this a couple of months ago and this was just talked about on flyertalk. Told over there more about this when I asked.
As I was boarding my Reno flight, I noticed on the flight display it showed "FOCUS FLIGHT." Finally I remembered to ask about this once I saw it, and it was explained that 2 cases, first case and most often, if an a/c departing the hub has less than alloted time on the ground at the outstation, it's deemed a "FOCUS FLIGHT" to bring awareness to crew, ground personnel and csa to the importance of doing all you can to help the flight get out on time. My flight to Reno was to arrive at 902 am and the return flight back to PHX
was scheduled out at 935am, thus only a 33minute turn and lower than the 35 mintues that HP
tried to standardize through the system. It helps identify that the next flight from the outstation back to the hub is pushing it, so as a hint it helps let everybody know. I think I mentioned that the a/c next to our gate was PDX
bound and it didn't state that on threir info display and it was because the a/c was to arrive PDX
at 1022am and depart again at 1115, meeting the mnimum 35 groundtime for HP
Second case, and parallels just a lil bit but not exactly If a late flight out of hub such as PHX
departs and the crew has a minimal rest night and early flihgt the next mornng, then FOCUS FLIGHT is used again for mostly the same reason, an on-time flght, but mainly to get crew out of the hub and enroute and thus eliminating or preventing that from the outstatoin, that the next morning the a/c will have to be delyayed for mandatory crew rest.