Focus on measurable service metrics and infrastructure: carrier connectivity and lane density, average lead times, pick-and-pack throughput, inventory accuracy, SLAs for order cutoffs, return-processing capability, and the provider’s experience with eCommerce and B2B cycles. Also validate local labor skillsets and contingency plans for transport disruptions.

Compare total landed cost, not just rack rates: include inbound handling, cross-dock fees, pick-and-pack labor, storage occupancy, and return handling. Assess scalability options such as flexible slotting, seasonal labor surges, and short-term expansion clauses. Request scenario-based quotes tied to KPI thresholds.

Key factors are road condition and connectivity to primary corridors, density of regional carriers, cross-border clearance efficiency, availability of local drayage, and 3PL’s relationships with carriers. Also consider warehouse layout for rapid staging, cross-dock lanes, and proximity to population centers for last-mile delivery.

Validate systems integration (WMS and order management APIs), multi-channel order routing, batch-picking vs. single-order picking capabilities, returns flow and inspections, kitting and light assembly services, and real-time reporting. Conduct an operational trial or pilot to confirm SLA adherence and peak-season responsiveness.