Assess WMS functionality, API and EDI integrations with your sales channels, order accuracy and OTIF metrics, peak capacity handling, and visibility tools. Review sample SLA contracts, chargeback policies, and references for seasonal performance to match service levels to SKU velocity and customer expectations.

Model landed cost impacts: ocean and feeder rates, port handling, drayage, warehousing per‑unit storage and handling, and inbound consolidation. Evaluate regional carrier access and transit time reliability for key lanes to minimize buffer stock and optimize reorder points.

Require proof of temperature‑controlled storage if needed, bonded or customs facilitation for import flows, inventory traceability, barcode scanning and cycle‑count practices, and demonstrated multi‑channel pick/pack processes with effective returns handling.

Confirm the 3PL’s customs brokerage capabilities, bonded warehousing options, and experience with tariff classifications. Align inventory placement and consolidation strategies to reduce duties and expedite clearance, and verify documentation workflows to prevent border delays.