Evaluate WMS/EDI/API connectivity, pick‑and‑pack accuracy, inventory visibility, handling capacity (racked, bulk, cold), SLA terms, minimum order quantities, returns processing, and peak‑season surge capabilities. Also validate security, insurance, and compliance processes to match industry requirements.

Build cost‑to‑serve by SKU with inbound receiving, storage per pallet/CU, pick/pack per order, packing materials, outbound freight, and returns handling. Compare fixed fees, throughput tiers, and variable surcharges; request sample invoices and a pilot period to validate real transaction costs.

Key factors are proximity to main transport corridors, availability of reliable regional carriers, cross‑dock capacity, loading dock counts, and yard space for staging. Also confirm carrier performance SLAs, frequency of departures, and contingency plans for peak congestion or disruptions.

Require KPIs such as inventory accuracy, on‑time shipping rate, order cycle time, picking productivity, dock turnaround, and claims rate. Set clear SLA penalties, reporting cadence, and data access for real‑time dashboards to monitor performance and continuous improvement.