Prioritize on‑time order cycle time, inventory accuracy (cycle count results), pick‑and‑pack throughput, receiving dock capacity, cold‑chain integrity if required, WMS integration/APIs, SLA terms, and proven carrier relationships. Also verify returns handling, customs facilitation, reporting cadence, and the provider's ability to scale labor and racking during peak seasons.

Transportation costs are driven by feeder frequency, last‑mile carrier density, and consolidation options. Providers with established carrier contracts, scheduled feeder services, and cross‑dock capabilities reduce per‑unit freight. Model zone rates, minimums, and accessorials across volume tiers to understand total delivered cost and service tradeoffs.

Conduct a site visit to inspect racking, segregation, security, and dock operations; audit WMS functionality and API connectivity; request proof‑of‑performance reports (OTD, accuracy); validate insurance, customs clearance experience, and labor agreements; and run a pilot SKU set to measure pick rates, packing quality, and return handling prior to long‑term commitment.