Using Workflow Work Items 
The workflow system creates one workflow work item for each workflow started. The workflow system also creates one workflow work item for subworkflows started from a workflow.
The workflow work item serves as a central incoming point for an executed workflow or a workflow that is being executed.
Workflow work items are not displayed in the Business Workplace but can be found using the work item selection.
A workflow work item can also be identified with the type code F in the technical information on the workflow.
You can access the corresponding workflow log and the workflow container directly from a workflow work item. You access these for:
Error diagnosis and error correction if no work items are displayed
Information on steps of the workflow (including their actual agents, notes, and ad hoc objects) already processed
Modifying an ongoing workflow by changing the workflow container
Reporting on completed processes.
For more information on possible statuses and status transitions, see Status of a Workflow Work Item and Status Transitions of a Workflow Work Item.