Prioritize proximity to ports and major carriers, intermodal access, racked cubic capacity, automation and WMS compatibility, SLA history (order lead times, accuracy), scalability for peak demand, and the 3PL’s experience with your channel mix (eCommerce vs B2B vs omnichannel).

Model landed cost by combining origin inbound, drayage, regional linehaul, and last‑mile rates with facility handling charges, dwell time, and expected detention. Factor carrier density, frequency, and accessorials; run cost‑to‑serve by SKU and destination zones to compare facilities accurately.

Key features include efficient pick‑pack layouts, real‑time WMS/WCS integration, returns processing, kitting and light assembly, climate control for perishables, and adequate staging/dock capacity. SLA adherence, inventory traceability, and reverse logistics workflows directly affect customer experience.

Ask about business continuity plans, insurance and liability limits, customs and bonded facility capabilities, cybersecurity for systems integration, audit and inspection records, safety programs, and KPIs tied to penalties or remediation for SLA breaches.