Prioritize proximity to port terminals and major carrier routes, WMS/TMS integration, slotting and kitting capabilities, returns management, and SLA-backed outbound cutoffs. Also evaluate scalability, security, and temperature-controlled capacity if your SKUs require it.

Close port access and multimodal links reduce drayage and inland transit, enabling shorter lead times and lower landed costs. Reliable feeder services and coordinated dray scheduling with 3PLs help minimize container dwell time and improve on-time fulfillment rates.

Warehouse layout optimized for pick-path efficiency, real-time WMS with barcode/RFID support, configurable pick faces, dedicated packing stations, and QC checkpoints are critical. Look for 3PLs offering slotting optimization and process KPIs like orders per hour and accuracy rates.

Key cost drivers include storage density (pallet vs. cubic), handling fees, inbound receiving charges, pick-and-pack rates, and value-added services. Negotiate based on volume commitments, longer contract terms, shared technology investments, and seasonal rate caps tied to throughput forecasts.

Confirm 3PL experience with customs brokerage, bonded warehousing options, accurate ASN/EIN processing, and EDI or API links to customs authorities. Validate their audit trail for import/export documentation and SLA commitments for clearance times to avoid demurrage.