Prioritize real-time WMS integration (API/EDI), accurate inventory visibility, multi-temperature storage if required, flexible slotting and pick-pack processes, and clear SLAs for order accuracy and lead times. Evaluate scalability for seasonal peaks and capacity to support B2B pallet movements alongside eCommerce parcel fulfillment.

Proximity to major highways and border crossings reduces drayage and overland transit times, lowering fuel and driver costs. Select 3PLs with established carrier contracts and consolidation options to improve rates, reduce empty miles, and shorten time-in-transit for both domestic and cross-border shipments.

Look for validated cold-chain systems with temperature monitoring, backup power and generator redundancy, secure bonded storage for high-value goods, CCTV and access controls, and documented procedures for contingency response to minimize spoilage and loss.

Negotiate transparent cost-to-serve items (receiving, storage, picks, returns, pallet handling), minimum volume commitments, SLAs for order lead time and accuracy, charge-back terms for errors, and regular performance reviews with KPI reporting (OTIF, accuracy, dwell time).