Prioritize measurable service levels and integration: WMS/TMS compatibility, real carrier connectivity, inventory visibility, documented SLAs, cost‑to‑serve modeling, returns handling, customs brokerage experience, insurance limits, and a demonstrated ability to scale labor and space during peaks.

Centralized hubs lower fixed costs and central inventory but increase last‑mile time/cost. Multi‑node networks reduce transit times and improve delivery SLAs at higher inventory carrying and operational expense. Choose based on order density, delivery promises, and acceptable inventory investment.

Require native or API‑driven WMS/TMS integrations, real‑time inventory sync, EDI/API order flows, barcode and lot tracking, reporting dashboards for KPIs, and clear procedures for returns and chargebacks to ensure operational transparency and minimize integration lead time.

Verify bonded warehousing status, customs brokerage capabilities, experience with HS codes and export documentation, VAT handling, security and audit records, and whether the 3PL supports duty suspension or temporary admission regimes relevant to your trade lanes.