Prioritize proven WMS integration, multi-carrier connectivity, transparent SLA reporting (OTIF, lead time), customs clearance experience, and scalable pick-and-pack operations. Also validate returns handling and value-added services (kitting, labeling) to support SKU proliferation and seasonal spikes.

Model total cost-to-serve including ocean transit, feeder charges, local drayage, inventory carrying, labor, and service fees. Factor in shorter transit times from nearby ports and lower facility rents; these can offset higher feeder or last-mile charges and improve inventory turn economics.

Essential capabilities include robust WMS with API connectivity, real-time inventory visibility, fast pick-and-pack processes, cross-dock and same-day dispatch zones, secure bonded storage for imports, and returns/refurbishment workflows to support B2C and B2B channels.

Request historical KPIs for inventory accuracy, on-time shipment rate (OTIF), average order cycle time, dock-to-stock time, capacity thresholds, disaster recovery plans, and examples of tech integrations. Validate audit reports, insurance, security, and customs brokerage capabilities.