Prioritize measurable KPIs: dock and bay count, pallet positions, slotting flexibility, WMS/TMS compatibility, real-time inventory visibility, order accuracy targets, and peak capacity plans. Also validate carrier connectivity, transit times to primary markets, onboarding timelines, and transparent fee structures.

Closer access to expressways, rail spurs, and seaports reduces drayage and linehaul time, lowering landed cost and improving ETA reliability. For B2B lanes this can mean shorter replenishment cycles and lower safety stock requirements, directly affecting inventory carrying costs.

Assess returns processing, quality inspection, kitting/assembly, pick‑and‑pack scalability, and peak staffing models. Consider whether the 3PL offers temporary floor space, automated sorting, and SLAs for returns disposition to keep SKU velocity consistent.

Negotiate clear fee schedules for storage, pick/pack, receiving, and value‑adds; define SLA targets (order accuracy, on‑time shipping); include volume tiers, indexation clauses, minimum notice for seasonal capacity, and audit rights for billing reconciliation. Consider short‑ and long‑term rate review windows.