Prioritize SLA metrics (order lead time, pick-to-ship), WMS integration and EDI/API connectivity, dock and trailer capacity, scalability during peaks, inventory accuracy, returns processing, and carrier mix. Also evaluate reporting cadence, security, and value‑added services like kitting or QC.

Location affects transit windows and carrier choices. Proximity to major corridors and freight gateways reduces mileage and transit time, enabling lower transportation spend and better delivery promises. Rail and intermodal access can reduce inbound costs; tradeoffs include handling and drayage expenses.

Require a modern WMS with inventory visibility, scalable pick-and-pack labor, slotting and replenishment strategies, value‑add services (kitting, labeling), returns management, and flexible storage options (short- and long-term). Confirm ability to scale labor and equipment for peak seasons.

Common models include per-pallet or per-SKU storage, per-pick handling fees, receiving and cross-dock charges, and minimums. Negotiate clear SLAs, volume tiers, audit rights, short pilot terms, and service credits for missed KPIs. Request transparent routing fee pass-throughs and regular cost reviews.