What Delay Guard does
Delay Guard is a forward-looking signal on a shipment's result page. Instead of only telling you what has happened, it estimates whether a shipment is likely to be late — while there is still time to do something about it.
It produces one of three things:
- "A delay is likely" — the shipment has passed the point by which most shipments on this route had already moved on (its p90 transit time).
- "Running a bit past the usual time" — it is stalled (no movement for ≥48h) somewhere between the typical and the slow end of the route.
- Nothing at all — when the data does not support a confident call.
Why it stays quiet sometimes
Delay Guard is built on the route's own history. If TrackJet has seen too few shipments on a route (fewer than ~10), the statistics are not mature, so it says nothing rather than raise a false alarm. Honest silence beats a guess — a delay warning you can't trust is worse than none.
How it differs from a plain "it's late"
A naive tracker compares against a fixed promised date. Delay Guard compares against what actually happens on that route, so it adapts: a route that is normally slow won't trigger early, and a route that is normally fast will flag a stall sooner.
Where you see it
It renders inline on the public result pages (parcel, post, container, bill of lading) for shipments with a materialised timeline. The same signal feeds the [SME panel](/docs/sme-panel)'s "needs attention" count, so a manager sees one coherent picture.