Prioritize measurable SLAs for order accuracy and transit, real-time inventory visibility, and robust WMS/API integrations. Also confirm carrier connections, returns workflows, peak-season scalability, and availability of value-added services such as kitting, lot control, and custom packaging to match your service model.

Perform a landed-cost analysis comparing zone-based parcel spend, LTL/TL routing, and inventory carrying costs. Model sample order volumes to compare transit days-in-transit, zone skimming opportunities, and warehouse cost-per-order to get a clear cost-to-serve delta before switching providers.

Confirm pick/pack accuracy, multi-channel order orchestration, batch and pallet shipping capability, returns processing, and reverse logistics flows. Also verify EDI/API connectivity for trading partners, SLA reporting, and options for kitting, assembly, and lot/expiry management where applicable.

Key attributes include dock door count and configuration, clear height, yard and trailer parking, on-site power and IT connectivity, site expansion potential, proximity to interstates and carrier hubs, and local labor market depth. Also evaluate lease flexibility and local incentives that affect total cost of occupancy.