mediumScenarioDesignMidSeniorStaff
A shipment has produced no scan events for eighteen hours. Is that a problem?
4 min readUpdated 2026-08-15
Answer
Short answer
It depends entirely on where it stopped, because silence is normal on a long line haul and alarming between two hand-offs that should be minutes apart. The design that answers it is an expected next event with a deadline per milestone, rather than a threshold on time since the last scan.
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Likely follow-ups
- How do you alert on an event that never arrived?
- The carrier's feed is down. How do you tell that apart from stalled shipments?
- Who should be paged, and what can they do about it at 2am?
- How would you decide the deadline for each milestone?
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