First-call on-time is the share of technician-days on which the tech arrives at the first scheduled job of the day within its promised time or window. Dispatchers watch it because a late first stop pushes every later stop, and because nothing earlier in the day can be blamed for it.
The formula
First-call on-time = First jobs arrived on time ÷ Tech-days with at least one job
Say 10 technicians work 20 days in a month. That is 200 first calls. If 164 arrive on time, first-call on-time is 164 ÷ 200 = 82%.
Use the same definition of "on time" you use for your overall on-time arrival rate: inside the window, or within a set number of minutes of the promised time. The guide to measuring on-time arrival covers how to set that threshold and where the timestamps come from.
Why the first stop sets the day
Every later arrival carries the overruns of the jobs before it. The first arrival carries none. If it is late, the cause sits in the morning itself:
- The start. Load-out, a morning meeting or picking up parts runs longer than planned.
- The first drive. It is often the longest drive of the day, and it happens in the morning peak. The Federal Highway Administration's congestion reports treat 6 a.m. to 9 a.m. on weekdays as the morning peak period (FHWA Urban Congestion Report documentation, as of October 2026). A drive estimated at midday speeds will run long at 7:30.
- Where the drive starts. A first job timed from the shop is wrong for a tech who takes the truck home, and the other way round.
Once the first job is late, the delay flows down the day. A 20-minute miss at 8:00 is still on the board at 10:00 unless a job runs short. That is why first-call on-time often predicts the day's schedule adherence better than any later stop.
How to improve it
- Time the first drive from the real starting point and the real hour. Morning traffic and the tech's actual start location both matter.
- Plan the morning start as its own block. If load-out takes 20 minutes, the first job cannot start 10 minutes after clock-in.
- Look at first-call misses by tech and by area. A pattern usually points to one cause: a long first drive, a slow yard, a habit.
CrewLink offers start times computed from where the truck will be and the drive at that hour, and its live board shows each tech's status against the next arrival, so a slipping first call is visible before the customer calls.
Related terms
- On-time arrival rate measures every arrival, not just the first.
- Schedule adherence measures how closely the whole day followed the plan.
- Drive time is the part of the first call that most often runs long.
What to take away
- First-call on-time = first jobs arrived on time ÷ tech-days with at least one job.
- The first stop carries no earlier overruns, so a miss points at the morning start or the first drive.
- Time the first drive from where the truck really starts, at morning-peak speed.
Common questions
What is a good first-call on-time rate?
It should be higher than your overall on-time rate, because the first call has no earlier jobs to delay it. If the two are close, your morning start or first drive is the problem.
How is first-call on-time different from on-time arrival rate?
On-time arrival rate counts every arrival. First-call on-time counts only the first job of each tech's day, which isolates the morning start and first drive.
Should the first job be scheduled from the shop or the tech's home?
From wherever the truck actually starts that day. If techs take trucks home, time the first drive from home, and expect it to be slower during the morning peak.