Prioritize proven port-to-warehouse transit times, multi-carrier connectivity, WMS integration with your order system, cold-chain capability if required, and clear SLAs for pick, pack and ship. Also evaluate value-added services like kitting, returns handling, and local customs clearance to reduce lead-time variability.

Track landed cost per order, on-time in-full (OTIF) rate, inventory turns, average order cycle time, and return-to-fulfillment ratios. Use these KPIs to compare proposals and to negotiate storage tiers, throughput pricing, and accessorial fees with potential 3PLs.

Look for reliable dock access and staging, temperature-controlled zones, cross-dock and consolidation options, real-time inventory visibility via WMS/EDI, and flexible slotting to handle both pallet and piece-pick flows. These features support mixed B2B pallets and direct-to-consumer shipments efficiently.

Verify local carrier agreements and regular sailing/flight schedules, confirm customs brokerage competencies and certifications, review insurance and liability terms, and request references for seasonal peaks. If helpful, ask for a site visit or an operational onboarding plan detailing cut-off times and exception workflows.