Prioritize carrier access, WMS functionality and integrations, handling of returns and reverse logistics, SLA performance for pick/pack accuracy, and scalability for peak seasons. Also assess storage types (ambient/cold), cross‑dock capability, and real estate proximity to your customer clusters.

Location impacts drayage, road transit times, and last‑mile miles. Warehouses near ports and major highways reduce inbound container handling and carrier handoffs, lowering lead times and transport spend. Closer proximity to dense customer zones reduces final‑mile costs and improves service windows.

Require real‑time WMS with API connectivity to marketplaces, ERP, and carriers, barcode/RFID inventory controls, automated pick/pack workflows, and reporting for inventory aging and order cycle times. Confirm support for batch processing, returns, and kitting where applicable.

Expect modular pricing: storage per pallet or cubic meter, pick/pack fees, inbound receiving charges, and value‑added service rates. Negotiate minimums, volume tiers, and seasonal uplifts. Use SLAs with penalties for accuracy and on‑time fulfillment to align incentives.

Assess historical throughput data, temporary labor pools, flexible racking, overflow plans, and the 3PL's ability to onboard SKUs and integrate forecasting data. Look for demonstrated peak‑season performance metrics and contingency plans for rapid scaling.