Require measurable KPIs (on-time shipments, order and inventory accuracy, dock-to-stock times, pick-rate productivity) plus clear SLA remedies. Verify WMS compatibility, EDI/API connectivity, near-real-time reporting, and ability to support returns and multi-channel inventory visibility.

Assess parcel zone impacts, LTL terminal proximity, and common carrier density. Model zone-skipping and pool distribution opportunities; compare landed cost versus transit-time tradeoffs. Prioritize 3PLs with strong carrier contracts and visibility to optimize routing and reduce freight spend.

Look for clear specifications on racked capacity, ceiling height, dock-door count, staging areas, temperature-controlled bays, automation readiness and scalable labor plans. Confirm security, slotting strategy and available value-added services like kitting, light assembly, and reverse logistics.

Require a defined onboarding timeline, pilot volume, SLA definitions and penalties, audit and reporting access, capacity commitments, and clear exit terms. Request client references, site tours, and a proof-of-concept to validate performance against agreed KPIs before committing long term.