Prioritize measurable KPIs: order accuracy, average order cycle time, on‑time delivery rates, and inventory accuracy. Confirm WMS/APIs for real‑time visibility, carrier integrations, slotting and picking methods, capacity for peak season scaling, returns processing, security/compliance, and transparent billing models that align cost to activity.

Location drives transport miles, carrier mix, and delivery windows. Warehouses nearer demand clusters lower parcel spend and transit days, enable zone skipping, and reduce cross‑dock needs. Consider regional carrier density, road quality, and proximity to secondary markets to optimize landed cost and SLA adherence.

Request operational audits, SLA definitions with financial remedies, real transaction reporting, audit rights, insurance and liability clauses, clear inventory ownership, onboarding timelines, exit and transition terms, and a defined change‑order/pricing mechanism to avoid hidden charges and preserve continuity.