Prioritize carrier density, transit-time maps to your customer base, and warehouse capabilities (e.g., cross-dock, temperature control). Require visibility (real-time WMS/API), clear SLAs for picking/packing, and a documented plan for peak season throughput and returns processing.

Model unit economics including inbound freight, handling, storage days, pick-pack fees, and outbound parcel or pallet shipping. Include inventory carrying, slotting efficiency, and potential surcharges. Run scenario analyses for SKU velocity bands and omnichannel split to compare total landed cost across locations.

Request references, audit access, insurance and contingency plans. Standard KPIs: on-time dispatch, order accuracy, inventory accuracy, dock-to-stock time, and average dwell. Verify IT integration capabilities, scalability of labor plans, and escalation protocols for service failures.