Prioritize a proven WMS with real-time inventory, API/EDI carrier integrations, throughput-tested cross-dock processes, and measurable KPIs (OTIF, inventory accuracy, order cycle time). Also confirm onboarding timelines, peak-season staffing plans, and security/compliance for your product class.

Model cost-to-serve by combining storage rent, handling (pick/pack), inbound/outbound transit, parcel/LTL rates, and value-added services. Factor in slotting optimization, expected returns rate, minimum volume discounts, and incremental peak labor to get an apples-to-apples comparison.

Key factors are proximity to major highways and intermodal terminals, density of parcel and LTL carrier nodes, and last-mile delivery population. Facilities with multiple carrier docks and local route density typically deliver lower transit times and better negotiated parcel rates.

Require clear SLAs for order accuracy, pick/pack cycle times, and on-time shipments; documented surge staffing plans, reserved pallet and bulk capacity thresholds, and transparent chargebacks. Include audit rights and regular performance reviews tied to remediation timelines.