Prioritize multimodal connectivity (rail, highway), carrier density, WMS/OMS integration, SLA performance history, and value-added capabilities such as kitting, returns processing, and temperature control. Also assess labor availability, security, and proximity to major demand corridors to optimize transit times and cost-to-serve.

Model total landed cost: inbound routing, storage per pallet/day, pick-and-pack fees, outbound freight, and returns handling. Include inventory carrying costs and safety-stock trade-offs; compare centralized versus multi-node placement using carrier rates and transit-time data to quantify savings and service impacts.

Look for flexible racking, mezzanine capacity, scalable labor pools and temp staffing relationships, WMS-driven slotting and batch picking, cross-dock staging, and automation readiness (pick-to-light, conveyors). Contract terms for seasonal capacity and rapid onboarding are also critical.

Verify customs clearance times, bonded warehousing options, documentation requirements for cross-border shipments, and any inspection regimes. Evaluate duty/tariff implications for transshipments and ensure the 3PL supports compliance, export documentation, and trusted-trader processes to avoid delays.