Evaluate by comparing transit times to your top customer ZIPs, carrier access and negotiated rates, WMS integration and SLAs, labor productivity (lines/hour), and variable cost models (pick/pack fees, storage tiers). Request proof of performance: transit time matrices, slotting strategies, and sample invoices to model true cost-to-serve.

Prioritize proximity to ports and interstates, intermodal rail access if needed, parcel carrier hubs, and last-mile density. Assess facility capabilities: cross-dock areas, bulk and pallet positions, secure receiving, and scalable labor pools to support same-day or 2-day delivery programs.

Negotiate clear SLAs for order lead time, order accuracy, and on-time shipping; cost elements (storage tiers, pick/pack, returns handling); minimum volume clauses; scalability windows; and penalty or rebate structures tied to KPIs such as OTIF, inventory accuracy, and chargeback resolution timelines.

Request carrier panel lists, lane rate samples, and historical tender reject rates. Compare average transit times and LTL vs TL consolidation strategies. Model total landed cost including dray, fuel, and accessorials across your top freight lanes to identify the most cost-effective 3PL network.

Conduct a detailed onboarding checklist: system integration tests (EDI/API), cycle count reconciliation, slotting plan review, sample outbound and returns flows, staffing plan for peak windows, and a 30- to 90-day service pilot with defined KPIs to validate performance before full cutover.