Prioritize order accuracy, on-time-in-full (OTIF), dock-to-stock and pick-to-ship times, throughput (pick/pack rates), inventory accuracy, and SLA remedies. Also evaluate WMS integration, EDI/API support, returns processing, peak season surge capabilities, and visibility into labor and capacity planning.

Proximity to highways, port gateways, and carrier hubs shortens transit lanes and can reduce LTL and parcel zone charges. Strong carrier density enables zone-skipping, consolidated freight, and better negotiated rates—lowering per-unit costs and improving predictable transit times for domestic and cross-border shipments.

Require a WMS with omnichannel routing, scalable pick/pack capacity, automated sortation or pick-to-light where appropriate, temperature control if needed, and flexible labor pools. Evaluate returns reverse-logistics processes, RMA handling, and the 3PL’s ability to provide seasonal labor and reserved dock capacity.