A deliverable is a Work Product that provides a description and definition for packaging other Work Products, and may be delivered to an internal or external party.  Therefore, a Deliverable aggregates other Work Products. 

A Deliverable is used to pre-define typical or recommended content in the form or work products that would be packaged for delivery.  The actual content and packaging of the Deliverable may need to be modified for individual projects based on these recommendations.  Deliverables are used to represent an output from a process that has value, material or otherwise, to a client, customer or other stakeholder.