Prioritize measurable capabilities: on‑time fulfillment and order accuracy, warehouse throughput and storage layout, IT integration (WMS/EDI/API), flexibility for seasonal peaks, security and compliance, and clear cost models including handling, storage, and accessorials.

Expect basic racked storage, dedicated picking/packing lines, cross‑dock bays, and limited temperature‑controlled zones. Confirm available cube, dock configuration, power reliability, pest control, and whether a WMS and barcode scanning are standard for inventory accuracy.

Longer transit or constrained carrier pools increase buffer inventory and transport premiums, raising landed cost and complicating tight SLAs. Evaluate carrier density, scheduled departures, cross‑dock options, and typical door‑to‑door times to model inventory and service tradeoffs.

Negotiate clear KPIs (OTIF, order accuracy, inventory accuracy, average fulfillment lead time), SLA remedies and credits, minimum notice periods for volume changes, data access and reporting cadence, and defined onboarding and disaster recovery procedures.