Prioritize pick/pack accuracy, order cycle time, dock-door throughput, SKU slotting efficiency, and inbound/outbound lead times. Verify WMS compatibility, barcode scanning, returns processing, and real-time inventory reporting. Include SLA targets and penalties for chargebacks and late shipments.

Port proximity reduces ocean transit but customs clearance and consolidation frequency determine total lead time. Assess bonded warehousing to defer duties, evaluate LCL/FCL consolidation options, and confirm regional carrier schedules to avoid unexpected demurrage and minimize landed cost.

Negotiate transparent tiered storage rates, per-pick and handling fees, throughput discounts, and caps on accessorial charges. Define minimum volume commitments, service-level KPIs, audit rights, termination windows, and periodic rate-review clauses tied to clear performance metrics.

Request WMS feature lists, API/EDI documentation, uptime and SLA reports, and examples of past integrations. Run an integration sandbox test, review reporting cadence, and confirm support for real-time inventory sync, order routing rules, and exception handling workflows.

Evaluate power and utility reliability, insurance and liability limits, disaster recovery, and dual-sourcing options. Confirm labor stability, security protocols, customs disruption plans, and the 3PL’s capacity to scale during peak seasons or reroute freight in case of port or road closures.