A load carries one or more complete shipments (never
a partial shipment) between two points. Loads are created as a result
of the routing for a shipment.
Creating a load
Creating a load is done as a part of the routing process.
Load execution pipeline
Beginning from its creation, a load document flows through
a set of transactions and statuses until its completion. This chain
of transactions and shipment statuses is called the load execution
pipeline.