Prioritize WMS/API integrations for real-time inventory visibility, proven pick-and-pack accuracy, SLA metrics (OTIF, order cycle time), scalable labor for peaks, returns processing, and clear billing for storage, handling, and value-added services. Validate carrier partnerships and local last-mile coverage to control landed cost.

Sites closer to main highways reduce trunking distances and fuel costs, improve scheduled carrier frequencies, and lower last-mile transit variability. Location affects access to trunk carriers versus local couriers, influencing lead times and distribution cost—choose a site aligned to your primary lanes and delivery SLAs.

Negotiate clear KPIs: OTIF, pick accuracy, inventory accuracy, average order cycle, and chargeback windows. Define storage and handling rate tiers, minimums, surge capacity terms, lead times for season ramp, and termination/transition clauses to reduce cost exposure and ensure operational predictability.

Verify a modern WMS with API/EDI connectivity, barcode scanning and lot/serial control, racking and multi-temperature capability, secure bonded storage if needed, reliable backup power, trained picking labor pools, and documented procedures for returns and cross-docking to support omnichannel flows.