Miami to Boca Raton is 45–50 miles and 50–70 minutes, 90 in traffic. A truck that crosses the corridor twice in one day loses 4 hours. So the open calls are split by area, one truck per stretch of the corridor. When there are more calls than the trucks can do, the oldest calls go first and the newest wait for the next morning. Until the day starts, or until the call sheet is opened, the split is redone every time a call is added. After that a new call joins the truck it adds the fewest miles to, and nobody else's list changes. The areas below are just names for those stretches.
A South Florida attic passes 130–140°F within minutes of a mid-90s afternoon. 6–9a is the window for real attic work; 9–10:30a is short diagnostics only; 11a–5p should be emergencies only. So the day sorts hot-first, and an attic check that still lands past the cutoff goes out flagged: keep it short. A replacement up there has to be finished by the cutoff, not just started, so it goes first on its truck, straight from the distributor, and only one fits per truck per morning. One that can't be finished in time goes first thing the next morning.
Booking every call as "one hour" is what makes the day collapse by 2pm. Base minutes are one tech, small system, easy access; the multipliers do the rest. Two techs cut it to 65%, not 50% — someone still has to talk to the customer and write it up.