Prioritize throughput capacity, dock and staging configuration, demonstrated SLA adherence, WMS and integration capabilities, labor pool depth, and transparent pricing (pick/pack, storage, inbound/outbound). Evaluate carrier options and sample lead-time runs to validate expected transit and landed-cost improvements.

Run zone-based rate simulations, compare average carrier transit times, and model cost-per-order (storage + pick/pack + freight). Use pilot orders and parcel analytics to validate last-mile performance and update landed-cost models with actual pick-up windows and carrier cutoffs.

Require an enterprise WMS with lot/batch tracking, API or EDI integrations, robust racking and dock capacity, cross-dock capabilities, and temperature-controlled zones if needed. Confirm reporting, inventory accuracy targets, and contingency processes for peak volumes.

Confirm the 3PL’s customs brokerage experience, bonded warehousing options, and ability to handle required documentation and duties. Validate VAT/tax handling procedures, compliance with local permits, and timelines for customs clearance to avoid inventory delays.