Prioritize WMS interoperability (APIs/EDI), pick-and-pack accuracy, order cycle time, OTIF performance, chargeback policies, capacity for seasonality, cold-chain if required, and carrier connectivity. Validate references for SLA adherence and request real KPIs and audit reports.

Location drives transit time, carrier choice, and delivery cost. Sites closer to major highways, regional airports, or cross-border corridors enable more carrier options and zone-skipping opportunities, reducing transit days and last-mile fees.

Negotiate transparent rate cards (storage, pick/pack, handling), minimums, billing cadence, and performance-based incentives. Define KPIs like inventory accuracy, order cycle time, OTIF, and return processing SLAs with agreed remedies and regular performance reviews.

Require a modern WMS with real-time inventory, API/EDI integrations, advanced slotting, batch picking support, and visibility tools. For scale, verify automation options, overflow plans, and partner ability to add labor or space quickly.

Build a cost-to-serve model that includes transit costs, inventory carrying, handling fees, duties/taxes, and expected service levels. Run scenarios by SKU, channel, and geography to compare quotes on total cost and customer experience impact.