Evaluate warehouse footprint relative to your customer density, dock door counts and staging capacity, WMS integration and real‑time reporting, labor scalability for peak periods, and local carrier networks for last‑mile coverage. Prioritize partners with measurable SLAs for pick accuracy, order cycle time and reverse logistics handling.

Proximity to major highways and regional freight routes reduces road miles and fuel costs; adequate dock and racking infrastructure speeds throughput and lowers dwell time. Strong carrier access enables multi‑lane negotiation and route optimization, which together reduce transit variability and total landed cost.

Common cost drivers include storage per pallet/rack position, pick‑and‑pack fees per SKU or pick, inbound/outbound handling, special services (kitting, temp control), and value‑added services. Expect blended labor surcharges for peaks, fuel/transport pass‑throughs, and setup fees for WMS integrations.

Request SLA templates and historical KPIs (OTD, accuracy, inventory variance), run integration tests with the 3PL’s API or EDI sandbox, and conduct a site visit to verify equipment and security. Include penalty/reward clauses linked to measurable metrics and clarify escalation paths for exceptions.