Prioritize scalable footprint, proven WMS with real-time inventory visibility, SKU-level pick accuracy, channel-specific packing capabilities, and SLA metrics for cut-off and transit times. Also evaluate carrier integrations, on-site labor availability, and the 3PL’s experience with returns and peak-season scaling.

Positioning inventory closer to customer clusters reduces parcel zones and transit days, lowering last-mile charges and improving delivery windows. It also enables a blended shipping strategy (regional parcel, LTL, and local couriers) that optimizes cost per order and improves on-time delivery rates.

For B2B focus on dock-level handling, pallet consolidation, pick-and-pack for bulk orders, and ASN/EDI integrations. Technology should support batch fulfillment, advanced shipping notices, and inventory allocation rules to manage large orders and scheduled deliveries efficiently.

Validate financial stability, client references, insurance and liability terms, on-site security and compliance certifications, and disaster recovery plans. Conduct a site visit to review racking, dock capacity, yard operations, and the 3PL’s KPIs for accuracy, on-time shipments, and inventory reconciliation.