A shipment wave is what we use to generated the work based on the shipment. You could have many ways you process waves some could be automatic for some times of shipments other shipments you might to as a one off so you can create a wave manually. This allows you to pick the shipments and decide when you want to release the wave to allow the work to handled.

Here is a quick look at how to create a shipment wave.

Cheers

Lachlan