Prioritize transit time to core customer zones, carrier and lane density, WMS/API integration for order visibility, pick-and-pack accuracy rates, and the 3PL’s ability to scale headcount and floor space during peak periods. Also review billing transparency and SLA penalties to align incentives.

Corridor access dictates route directness and consolidation opportunities: closer proximity to primary highways and intermodal hubs reduces miles-in-transit and empty miles, lowering cost per pallet. Strong carrier density improves pickup frequency, rate negotiation, and on-time performance, especially for scheduled B2B lanes.

Look for bonded customs handling if cross-border trade applies, temperature-controlled storage where applicable, kitting and light assembly, serialized inventory control, and a structured returns process with RMA workflows and disposition options. Reliable reporting and audit trails are essential for omnichannel reconciliation.