Prioritize measurable service metrics and infrastructure: inventory accuracy, order cycle times, on-time shipping percentage, warehouse management system (WMS) functionality, and handling capabilities for SKU complexity. Also evaluate cost-to-serve modeling and minimum volume commitments to ensure alignment with your channel mix.

Carrier access affects lane density and routing flexibility. Consider:

Look for a modern WMS with multi-channel order orchestration, real-time inventory visibility, API integration for marketplaces, and defined reverse logistics workflows. Additional capabilities include batch/pick-and-pack systems, returns triage, and reporting for cost-to-serve and SLA compliance.

Evaluate fixed and variable costs: storage tariffs, pick/pack rates, inbound receiving fees, and value-added service charges. Assess scalability options such as seasonal space availability, ability to add racked capacity, cross-dock throughput, and contractual flexibility to absorb growth without disproportionate cost increases.