Definition
Work item that represents a task at runtime that requires interaction with the user.

Since the user decision is also represented internally by a task, a dialog work item can also represent a user decision.
When a dialog work item is executed, the underlying object method of the task is called. The deadlines for executing dialog work items are monitored.
Use
A dialog work item is displayed with ready status in the workflow inbox of the Business Workplace. It is removed from the integrated inboxes of the other agents when the recipient reserves, executes, or processes this work item with other functions.
The database oriented approach used in SAP Business Workflow allows a work item to be seen by several recipients equally authorized in organizational terms in their inboxes and executed from there. However, only one recipient can actually reserve this work item for processing and execute it. The work item is then no longer available to any other recipients.
Integration
A task represented by a dialog work item can be
In the workflow definition, reference is made to tasks in the activity and user decision steps.
Tasks can be started as elementary activities directly in dialog or via a triggering event. These tasks are then also represented by a dialog work item in the workflow inbox.