Prioritize a warehouse with a modern WMS and API integrations to your OMS/ERP, proven pick-and-pack accuracy, cross-dock and consolidation services, cold-chain if required, returns handling, and transparent KPIs (OTD, accuracy, pick rates). Confirm SLA terms for throughput, peak season scalability, and access to carrier lanes relevant to your markets.

Carrier density and multimodal links determine routing flexibility: direct feeder-port calls, short-sea links, and reliable road corridors reduce transit time and enable consolidation, lowering per-unit freight cost. Evaluate port schedules, inland drayage capacity, and frequency of express and regional carriers to estimate transit variability and freight spend.

Key cost drivers include storage rates, pick/pack fees, receiving and put-away charges, handling of special services (kitting, labeling), and billing for labor or peak throughput. To optimize, negotiate activity-based pricing, volume discounts, shared-cost consolidation, and clear demurrage/customs pass-throughs; model total cost-to-serve across SKUs and shipping lanes.

Conduct operational audits, review historical throughput and peak season performance, verify insurance and compliance, and confirm redundancy plans. Specify measurable SLAs (accuracy, lead time, fill rates), remediation clauses, inventory reconciliation cadence, and integration testing. Include termination and migration terms to reduce vendor-lock risk.