Prioritize location relative to major highways, transit times to principal markets, and dock/yard capacity. Evaluate infrastructure (racking, temperature control), WMS and API capabilities, SLA performance metrics, and value‑added services. Consider carrier diversity and the 3PL’s ability to scale during peak seasons to maintain service consistency.

Cost drivers affect pricing through storage rates, labor‑intensive pick/pack fees, and transport surcharges tied to distance and fuel. Finance teams should request transparent cost‑per‑pallet and cost‑per‑order models, sample invoices, fuel/peak season surcharge policies, and true cost-to-serve analysis for targeted SKUs to compare providers.

Require a WMS with real‑time inventory, API or EDI integrations for order flow and carrier booking, pick/pack accuracy guarantees, returns processing, and reporting on OTIF and cycle counts. Insist on SLA‑backed lead times (same/next‑day where applicable) and regular audit access to inventory records.

Assess the 3PL’s yard and staging capacity, ability to handle palletized and mixed loads, and experience with consolidation for long‑haul and cross‑border lanes. Review carrier contracts, backhaul arrangements, customs handling expertise, KPIs for fill rate and lead time, and expansion options such as additional racking or satellite locations.