A technician is paid for eight hours. The business is paid for the part of those hours spent on site. The gap between the two is the whole game.
Why it matters
Two operations with identical headcount, identical pay and identical prices can differ by 30% in output, and the difference is almost never effort. It is how much of the day survives the drive. Raising productive minutes is the only way to grow output that does not require hiring, longer days, or rushing the work.
How you notice it slipping
Revenue per technician flattens while technician count rises. Technicians report being busy all day with fewer completed jobs. Time on site shrinks while total hours stay the same — the surest sign that drive time is eating the day from the middle.
What to do
Measure productive minutes as a share of paid hours, per technician, per week. Do not chase the number by shortening visits; that borrows from service quality and pays it back as callbacks a month later. Chase it by shortening the gaps between visits, which costs nobody anything and nobody notices except the finish time.
One caution on the measurement itself: time stamps are only as honest as the habit behind them. If technicians close jobs in batches at the end of the day, the number will look excellent and mean nothing.