Prioritize 3PLs with high dock counts, adequate staging and cross-dock space, and validated carrier partnerships for parcel, LTL, and regional drayage. Ensure WMS APIs for label and tracking integrations and ask for historical transit-time matrices to major customer ZIP clusters.

Evaluate landed cost modeling that includes storage, pick/pack, pallet handling, and inbound drayage. Compare transit-time maps to key customers, run zone-skipping scenarios, and request sample rate cards plus minimum volume discounts to quantify the trade-offs.

Look for real-time WMS/ERP integrations, carrier rate-shopping, and return-processing workflows. Track KPIs such as OTIF, order accuracy, average fulfillment cycle time, and on-hand accuracy. Consider dashboards and EDI/API availability for automated exception handling.

Negotiate volume-based capacity blocks with defined uplift windows, outline temporary labor rates and onboarding timelines in the SLA, and require contingency plans for peak surges. Include clear KPIs and penalties/bonuses tied to seasonal performance to ensure alignment.