Evaluate throughput capacity, SLA history, WMS/API integration, carrier access, returns handling and value-added services. Request KPIs (OTIF, pick accuracy), reference visits, and a short proof-of-concept run to validate lead times, peak-season scalability and cost-to-serve per SKU.

Confirm highway and port proximity, on-site dock capacity, trailer yard space, cross-dock capability, pallet racking and automation options. Verify presence of national parcel carriers, regional LTL terminals, and frequency of local carrier pickups to minimize transit-time variability.

Optimize slotting and SKU velocity, use multi-client pooling for seasonal SKUs, implement demand-driven replenishment, negotiate zonal shipping rates, and leverage WMS forecasting to lower safety stock and reduce holding costs while preserving service levels.

Negotiate OTIF, pick/pack accuracy, order cycle time, inventory accuracy, dwell time, returns processing time and capacity flexibility. Include clear chargeback terms, escalation procedures and agreed audit frequencies to enforce performance and manage peak-season surges.