Since You asked...LOL

"Hat Time Utilization"..The proportion of the available time (expressed usually as a percentage) that a piece of equipment or a system is operating. Formula: Operating hours x 100 ÷ available hours.

Flight Time of the HAT..
1. Sits in the back of my truck on drive to airport...30 min
2. Sits on the luggage rack on employee bus..........20 min
3. Head time from employee bus to gate.................10 min
4. Head time from gate to flight deck........................1 min
5. Sits in flight deck until day complete.............. 10-12 HRS
(depending on aircraft/seniority)
6. Sits on head from aircraft to hotel van.................10 min
7. Repeat for days of trip....
Total....1440 min/day..the hat works 21 min per day gives us a "utilization" of .0145 % of actual work. The hat gets paid (insert aircraft pay scale) X's hours flown..equals One Hell of A Negotiated Contract.
The Hat is a useless POS that should have been retired years ago, but I wear the damn thing because the guy who signs the front of my check says I have to.
LOL