On-time performance is usually decided long before the appointment window. The information that predicts a late arrival often exists hours earlier.
Checkpoints, not guesses
- T-6H — driver, equipment and location awareness
- T-3H — readiness confirmation
- T-1H — final position and risk check
- Arrival — check-in confirmed
The purpose is not surveillance. It is to identify readiness and late-risk problems before the scheduled arrival, whenever the available information allows it.