Prioritize location relative to key highways and customer clusters, WMS features and API/EDI integration, SLA and performance history (OTD, accuracy), labor skill sets for value‑added work, inventory security, and scalability of footprint and services for peak seasons.

Compare by modeling true costs: storage (per pallet/slot), picking and packing (per line/parcel), inbound receiving, cross‑dock fees, kitting, returns handling, and transportation rates. Include inventory days, shrinkage, and chargeback policies to calculate total landed cost per SKU.

Confirm bonded area access, customs brokerage partnerships, cold‑chain equipment (refrigerated racking, temperature monitoring), backup power and contingency plans, and certifications for food/pharma if applicable. Ensure the 3PL has documented chain‑of‑custody and traceability procedures.

Assess WMS capabilities, real‑time inventory visibility, API availability, and reporting. Key KPIs: inventory accuracy, order cycle time, on‑time dispatch rate, pick‑pack error rate, and return processing time. Request operator references and dashboard samples.