Prioritize measurable KPIs and capabilities: transit-time maps to target ZIPs, cost-per-order modeling (including receiving, storage, pick/pack, and shipping), carrier connectivity and negotiated rates, WMS/API integration for real-time inventory visibility, and labor flexibility to handle seasonality without service degradation.

Carrier density and multimodal links determine routing options and frequency: better access to parcel networks and maritime feeders reduces dwell and linehaul expenses, improves predictability for SLA commitments, and can lower expedited shipping spend when distribution is positioned close to end customers.

Look for facilities offering scalable racking, climate control if required, segregated picking zones, robust WMS with API/EDI support, value‑add services (kitting/returns), real-time inventory reconciliation, and reporting to align fulfillment metrics with commercial goals across channels.

Assess the provider's historical staffing models, access to flexible labor pools, documented surge staffing plans, cross-training programs, and subcontractor relationships. Ensure contractual SLA adjustments and cost modeling reflect peak volumes to avoid service gaps or hidden overtime costs.