Require clear KPIs: order accuracy, on‑time in full (OTIF), inventory accuracy, and pick/pack throughput. Verify WMS/API integrations for carrier rate shopping, EDI/CSV for orders, and real‑time inventory visibility. Also set onboarding timelines, exception workflows, and monthly performance reviews to ensure continuous alignment.

Closer proximity to highways and rail interchanges shortens transit lanes and lowers LTL zone fees, enabling lower safety stock and faster replenishment cycles. Use geographic demand analysis to place inventory at nodes that minimize total delivered cost while meeting service windows for both B2B and eCommerce customers.

Prioritize dock count and trailer capacity, racking and clear heights, climate control, secure storage, and return processing. Evaluate value‑adds: kitting, light assembly, labeling, and bespoke packaging. Confirm SLAs for peak season scalability and the 3PL’s ability to support omnichannel order routing.

Negotiate flexible labor clauses, temporary racking and pallet position options, and scalable slotting strategies. Establish a dedicated returns workflow with triage SLAs and disposition rules. Use forecasting windows and buffer inventory at the 3PL to absorb demand spikes while monitoring performance against agreed KPIs.