Prioritize facility layout (racking, dock capacity), multimodal connectivity (port proximity, road quality), technology (WMS, EDI/API integrations), proven SLA performance for pick/pack/ship, and access to trained labor. Also assess contingency plans for seasonal road or weather disruptions and spare capacity for peak demand.

Carrier density and feeder schedules affect transit variability: less frequent coastal feeder services and lower domestic trucking density can increase lead times. A local 3PL with consolidated carrier contracts, scheduled consolidation, and buffer inventory can reduce variability and improve on-time performance.

Expect standard fees for storage (per pallet/cu ft), handling (inbound/outbound), pick-and-pack (per order/line), value-added services, and minimum monthly charges. Negotiate throughput-based discounts, minimum-volume commitments, pass-through carrier rates, and performance-based SLA credits to align cost with service.

Adopt a hub-and-spoke or distributed inventory strategy, use localized fulfillment for last-mile reduction, enable shared inventory pools across channels, and require WMS integration for real-time visibility. Prioritize 3PLs offering cross-dock, same-day pick, and carrier aggregation to lower per-order shipping spend and improve fill rates.