Prioritize: 1) multi-channel order management and inventory visibility, 2) scalable pick-pack and returns processes, 3) integration with your OMS/WMS, and 4) proven peak labor plans. Also assess carrier access, SKU handling requirements, and SLA reporting to ensure alignment with order profiles.

Location and DC density reduce zone-skipping and optimize linehaul. Proximity to intermodal and major carriers lowers transport miles and parcel zone variance. Evaluate number of outbound lanes, regional sort centers, and negotiated carrier contracts to forecast parcel and LTL cost savings.

Negotiate transparent rate cards for receiving, storage, and pick-pack; volume and seasonal tier discounts; minimum service SLAs with penalties; WMS access and EDI/API terms; and clear chargeback rules for exceptions and returns. Include performance KPIs tied to billing.

Typical onboarding runs 8–16 weeks depending on complexity. Phases: discovery and scoping, WMS/ERP integration and testing, inventory sampling and test shipments, SOP alignment and training, then staged cutover. Allow buffer for carrier lane setup and initial performance tuning.