Prioritize proximity to major corridors, WMS functionality and API/EDI integration, measured pick-and-pack accuracy, scalable labour pools, and transparent cost-per-order reporting. Consider SLA guarantees for lead time and returns processing to support peak season predictability.

Closer proximity reduces linehaul mileage, fuel surcharges, and driver time, which shortens lead times and lowers zonal shipping rates. Nearness to highway junctions and hubs also increases carrier options, improving routing flexibility and reducing reliance on premium expedited services.

Essential capabilities include a modern WMS with real-time inventory, pick-and-pack operations, cross-dock and reverse logistics, cold-chain storage where required, and integration options (API/EDI). These elements support accurate inventory visibility and consistent order cycle times.

Ask about the 3PL's carrier roster, negotiated rates, average transit times to your core markets, last-mile partners, coverage maps, and contingency routing plans. Request carrier performance metrics and examples of rate zones to validate claimed coverage.

Common pricing components: storage (per pallet/sq ft), pick-and-pack fees, inbound/outbound handling, cross-dock fees, returns processing, and value-add charges. Model total landed cost by combining warehousing fees with linehaul, last-mile, packaging, and returns expenses to understand per-order economics.