Prioritize transit-time to target markets, carrier density, SLA metrics (picking accuracy, order cycle time), multi-temperature capability, systems integration (APIs/WMS), transparent cost-per-order, and scalability. Request operational KPIs and client references; run a short pilot to validate performance before committing to longer-term contracts.

Compare historical transit matrices and carrier service maps, run zone-weighted costing and time-in-transit models, request lane-level lead-time reports from prospective 3PLs, and pilot representative SKUs to measure real-world delivery windows and carrier mix performance against current baselines.

Focus on dock door count and configuration, clear height and floor load, racking systems, yard and trailer parking, cross-dock capacity, multi-temperature zones, hazmat handling, and available light assembly or kitting services to meet manufacturing replenishment and distribution requirements.

Include SLAs with measurable KPIs and service credits, transparent pricing and chargeback rules, minimum volume clauses, termination and transition rights, audit and data access, IT integration commitments, liability and insurance coverage, and agreed ramp-up plans for seasonal or volume growth.