Definition
Share of arrivals that occur within a defined window of the last published ETA.
Technical Details
Unit
%
Formula
arrivals with |ETA − gate-in| ≤ window ÷ total arrivals × 100
Example
If 86 of 100 stops arrive within ±10 min of ETA, ETA accuracy = 86%.
Implementation Notes
Store timestamps in UTC; display local time. Use monthly reporting.
Related Terms
ETA (Estimated Time of Arrival)
The predicted arrival time for a stop based on current position, route, traffic, dwell history, and constraints.
On-approach alert
A pre-arrival notification sent to a designated contact when a truck is approaching a stop.
Event→update latency
Time from a new signal (GPS ping, driver event, facility update) to an observable ETA/status change in the system.
Part of the Fleet Super Operator Standard (FSOP) v1.0 •Editorial Policy