Prioritize SLA reliability, inventory accuracy, order cycle time, and peak scalability. Evaluate warehouse layout (flow vs. storage), IT integration (WMS, EDI/API), value-added services (kitting, returns), and carrier contracts. Confirm KPIs, audit cadence, and dispute resolution terms before contracting.

Compare landed cost per SKU including drayage, rail/road transit, and handling fees. Model total delivery times and service levels for key routes. Factor in inventory carrying cost for faster replenishment from port-adjacent sites versus higher last-mile costs from inland distribution centers.

Require a modern WMS with API/EDI connectivity, real-time inventory visibility, barcode/RFID support, and exception management. Look for integration with marketplaces, OMS platforms, and carrier-rating engines. Ask for uptime SLAs, data security practices, and reporting granularity.

Include clear performance KPIs (OTIF, accuracy), inventory reconciliation terms, liability and insurance caps, transition timelines, and penalty/bonus structures. Define governance, escalation paths, and a phased ramp-up with acceptance testing to mitigate go-live disruption.