Prioritize proximity to major road corridors, SLA guarantees for pick/pack and cut‑off times, carrier integrations (API/EDI), inventory accuracy and cycle count processes, handling and returns workflows, and transparent costing that separates storage, handling, and outbound freight.

Request modeled cost scenarios for base and peak volumes, review flexible berth and dock access, confirm seasonal labor plans, evaluate value‑added services pricing, and verify the 3PL's ability to scale racked or bulk storage without long‑term capital commitments.

Verify carrier lane density and frequency to key customer regions, customs brokerage capabilities for cross‑border shipments, transit time SLAs, pickup cut‑offs, and contingency plans for road closures or capacity constraints impacting cross‑border freight.

Look for WMS with real‑time inventory visibility, OMS/WMS integrations for order routing, batch picking and slotting strategies, returns processing, kitting/assembly capabilities, and reporting tools that support channel‑level margin analysis.