A sourcing agent's work happens before a shipment exists: identifying suppliers, checking their production capacity and reliability, and negotiating price and terms on the buyer's behalf.
Where sourcing and logistics are handled by separate, disconnected parties, the handoff between 'goods are ready' and 'goods are shipped' is often where delays creep in — waiting on paperwork, re-confirming addresses, or re-negotiating freight terms after the purchase is already locked in.
Managing sourcing and freight as one continuous process removes that handoff gap, since the same team that confirmed the order can move straight into arranging inspection, packing, and transport.