DESIGN NOTE · YOUNGJUN PARK
Visibility starts with event quality
A design note on dependable logistics visibility. These are proposed design principles, not a report of a deployed implementation.
Preserve the source
Store event identifiers, source systems, event time, and ingestion time separately. A received timestamp alone cannot explain a delayed shipment update.
Expect duplicates and late arrivals
Make ingestion idempotent and define how late events can change a current view. Preserve the history so an operator can understand how a status was derived.
Separate observation from inference
Distinguish carrier-reported facts from calculated ETA and AI-generated interpretations. Show stale data explicitly instead of displaying a false live status.
Verify with realistic events
Evaluate duplicate delivery, missing coordinates, delayed arrival, conflicting sources, and replay after failure before relying on the view for operations.