The fleet is the view, not the report
Wialon keeps service intervals in a unit’s properties, one unit at a time, and answers what is due by running a report. The data here is the same; the question is turned round. The fleet is the default view, and a unit is what you open because something on it needs attention.
Each interval counts on whichever axis matches the work — kilometres for tyres, engine hours for a generator, calendar days for an inspection — and carries its own warning window, so due arrives when the workshop would say it does.
- Mileage, engine hours or calendar days, with a warning window on each
- Counted against the odometer and engine hours Wialon already reports — nothing is typed in twice
- Due and overdue totalled across the fleet, and broken out per unit