Cross-border shipment tables need separate forwarder and last-mile carrier records

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Storing only one carrier per shipment works for domestic parcels but breaks down for cross-border orders, which typically pass through a forwarder and a local delivery company. Each operator uses different reference numbers and scan terminology, so a single carrier field will be inaccurate for one of them. Delivery expectations should be modeled per carrier and per leg, using the 80th percentile rather than the mean, and quiet periods during line-haul and customs should not count as failures. Carrier resolution should prioritize reference number patterns over name matching, since misspelled or variant names can silently cause updates to stop. Modeling shipments as separate legs with distinct roles and timestamps lets teams identify which party to contact at each stage.

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