Assess service-level agreements (pick accuracy, same-day/next-day cutoffs), WMS/API integration for real-time inventory, EDI or cloud connectors for order flows, reporting granularity, and proof-of-delivery processes. Validate these through site visits, tech demos, and a short pilot to confirm operational compatibility.

Prioritize locations with direct access to major highways and proximity to national carrier terminals — this reduces inbound dwell, expands LTL/FCL options, and lowers last-mile costs. Also evaluate transload or rail interchange access where available for heavy-volume shipments to reduce total landed cost.

Break down costs into storage (per pallet/bin), handling (inbound receiving and putaway), pick-and-pack fees, labor surcharges, minimums, kitting/returns charges, and freight pass-throughs. Request sample invoices, billing cadence, and SLA penalties to reveal true landed fulfillment cost.

Evaluate contingency labor plans, temporary capacity options, WMS support for split-channel order routing, documented returns workflows, and historical performance during peak periods. Require KPIs (peak throughput, return turnaround, order accuracy) and references to confirm proven scalability.