Focus on measurable KPIs: order throughput (lines/hour), on-time shipping rate, inventory accuracy, and average order cycle time. Verify WMS/OMS/API integrations, reverse logistics processes, peak season scalability, and slotting strategies. Request sample SLA language and historical performance data to validate provider claims.

River and rail connectivity reduces overland trucking miles and can materially lower freight cost to coastal ports and inland hubs. Multimodal access shortens transit times and provides redundancy during peak periods. Model scenarios comparing direct trucking versus river/rail segments to quantify landed-cost and lead-time trade-offs.

Prioritize pick-and-pack efficiency, kitting, temperature-controlled storage where needed, returns processing, barcode scanning accuracy, and custom packaging. Also evaluate reporting cadence, inventory visibility, cycle counting, and the provider’s ability to handle promotional surges and SKUs with variable velocity.

Confirm the 3PL supports standardized APIs or EDI, real-time ASN and inventory feeds, and has proven integrations with your ERP/OMS. Ask for sandbox access or technical documentation, SLA on data uptime, and examples of carrier partners and TMS links to ensure seamless shipment creation and tracking.

Negotiate clear SLAs for accuracy, lead times, and chargebacks; transparent fee schedules for storage, handling, and value-added services; minimum commitment terms tied to volume bands; liability and insurance terms for inventory loss; and exit/transition support including data export and inventory handover procedures.