Assess 3PLs on SLA performance, inventory visibility tools (WMS/OMS integration), pick-and-pack throughput, returns processing and carrier network coverage. Consider cost-to-serve analyses for single-item orders vs. bulk B2B shipments and check peak-season capacity commitments.

Prioritize dock capacity, cross-dock capability, trailer parking, and forklift/automation availability. Verify access to primary carriers and regional pallet networks, average outbound transit times to key customers, and the 3PL’s carrier-negotiated rates.

Look for segmentation of returns workflows, inspection and refurbishment stations, kitting and bundling capability, EDI/API connectivity, and flexible SLA tiers for marketplace and direct-channel orders. Clear KPIs for returns turnaround are essential.

Evaluate lease and labor rates versus transit savings to major customer zones, proximity to ports and cross-border routes, and the 3PL’s ability to scale space quickly. Run a landed-cost model that includes transportation, inventory holding and handling fees to compare alternatives.