The following graphic illustrates how workflow interacts with applications, using the example of a store goods receipt:

No unique reference purchase order is found at goods receipt (since more than one open purchase order exists). Exception processing is triggered.

The exception processing function triggers the correct task required to solve the problem and puts all the fields determined so far in the container.

In workflows, workitems are created using tasks, containers, and object categories (in the above example the IDoc for goods movements with which the store goods receipts are transported).

Your system uses organizational plans to assign particular organizational units (for example, positions) to areas of responsibility (various tasks).