Maintaining the Assignment Between Change Document and Event Without Field Restrictions 
Prerequisites
The event that you want to create is defined as a component of an object type.
Procedure
You make the following settings to create an event each time a particular change document is written.

The object types offered to you by the system in the F4 input help usually have the same key structure as the change document object.
It may, however, make sense from a business point of view to create the event for an object type whose key structure is different from the key structure of the change document object. In this case, you must first enter a structure for the object type key and a function module in the workflow-relevant settings for change documents. The function module "translates" the key of the change document into the key of the business object. For further information, refer to
Maintenance of Workflow-Relevant Settings for Change Documents.
Changes to fields in various tables are generally logged with a change document object. Only one of these tables is the main table in the sense that the relevant change document is written with its key. The create, change and delete actions always associated with the main table.
Depending on how the change documents are used in the application, it may be that no change document is written upon create or delete actions.

When an item in a sales and distribution document (structure
VBAP ) is created, the header data of the document (structure VBAK = main table of the change document object) is changed. Therefore, in this case the change document written logs a change and not a create action.For further information on how you can react to the creation or deletion of non-main tables, refer to
Maintaining the Assignment Between Change Document and Event With Field Restrictions .Result
If you have catered for the creation of an event in the manner described above, you can use this event as a
triggering event of a task or workflow in the normal way.
If other conditions are to be checked for the linkage between the triggering event and the task to be started, use a
Event container of created event
In addition to other elements, the event container of the created event contains: