Prioritize carrier connectivity, real-time WMS integration, returns handling, and peak capacity. Evaluate order-to-ship SLA metrics, cross-dock throughput, and cold-chain certification if required. Consider proximity to major distribution lanes to minimize regional transit times.

Geography affects modal choice and zone distribution. Shorter regional lanes and quick access to ports/air hubs reduce transit and handling costs. Efficient local carrier networks enable zone-skipping and consolidated last-mile delivery, lowering parcel costs and improving delivery windows.

Look for cross-docking, pallet-level and piece-picking capabilities, kitting, light assembly, labeling, and quality inspection. Ensure the 3PL provides robust inventory reporting, EDI/API integrations, and secure storage options for regulated goods.

Seasonality requires flexible capacity clauses, scalable labor plans, and short-term storage options. Negotiate variable-rate structures, guaranteed access during peaks, and contingency plans for overflow to nearby facilities to avoid service degradation.

Require KPIs such as OTIF, order cycle time, inventory accuracy, pick-and-pack productivity, and return processing time. Regular scorecards, exception reporting, and API access to transaction-level data enable continuous improvement and cost control.