Prioritize location relative to border crossings and major highways, customs and FTZ capability, WMS/API integration and reporting, SLA metrics for order accuracy and lead time, scalable storage and labor availability, temperature-controlled capacity if needed, returns handling and cross-dock throughput for fast turn operations.

Bonded and FTZ services can defer or reduce duties, consolidate customs processes, and accelerate inbound/outbound clearance when managed by experienced brokers. Maquiladora programs streamline assembly and exporting but require compliance documentation; overall impact is lower landed cost and fewer customs delays when the 3PL has established processes.

Key factors are reliable cross-border trucking lanes to Southern California, established LTL/FTL carrier contracts, rail ramp access where applicable, appointment and gate systems for predictable turns, and seamless handoffs to U.S. last-mile carriers. Visibility via EDI/API is critical to manage lead times and OTIF performance.

Require explicit SLAs and KPIs for order accuracy, on-time-in-full (OTIF), inventory accuracy, customs clearance time, dock-to-stock dwell times, temperature control variance, damage rates, and periodic audit rights. Include remediation clauses and data reporting cadence to ensure continuous operational improvement.