Assess SLA reliability, inbound carrier windows and port connectivity, IT/ERP/WMS integration, value-added capabilities (kitting, returns, bonded options), and scalability. Evaluate local labor skillsets, lead-time sensitivity for peak seasons, and the 3PL's proven track record with similar SKUs or channels.

Closer port access and regular feeder services typically lower inland trucking and transshipment fees, shorten dwell time, and improve schedule predictability. That reduces buffer inventory needs and can lower expedited freight spend — but verify actual carrier schedules, berth capacity, and handling times to quantify savings.

Expect services such as real-time WMS integration, temperature-controlled storage options where available, returns processing, kitting/assembly, SKU-level visibility, and bonded or customs-support services. Also validate handling equipment, security standards, and disaster-resilience measures relative to your product needs.

Model total landed cost including ocean freight, transshipment, inbound drayage, inventory holding, and last-mile delivery. Compare inventory days-of-supply required under different lead-times and factor service-level targets. Include scenario testing for peak demand and contingency routing to understand risk and capital implications.