Prioritize throughput capacity, WMS integration and EDI/API connectivity, pick-and-pack accuracy, SLA-backed order lead times, and the provider’s carrier portfolio. Consider value-added services (kitting, returns), insurance/compliance, and scalability to handle seasonal peaks and SKU proliferation.

Closer proximity to arterial roads and major carrier lanes reduces fuel and linehaul costs and shortens transit windows, improving next-day/2-day coverage. Evaluate available carrier partners, cross-dock options, and local last-mile networks to quantify cost-to-serve by ZIP or delivery zone.

Key features include a modern WMS with real-time inventory visibility, barcode/RFID support, returns management, batch/lot tracking, temperature control if required, and interfaces for storefronts and marketplaces. Confirm reporting cadence, SLA metrics, and exception workflows.

Negotiate transparent rate cards for storage, pick/pack, inbound receiving, and value-added services; minimum-volume clauses, performance SLAs with penalties, chargeback rules for errors, and periodic rate review windows. Consider bundled pricing for multi-service commitments and clear dispute resolution terms.