When considering agile development, Architecture to Support Project will identify what products the enterprise needs, the boundary of the products, and what constraints a product owner has. This defines the enterprise’s backlog. A backlog is a list of features or tasks that need to be done to deliver a product or service. It is prioritized by the product owner based on the value and urgency of each item. Reference: The TOGAF® Standard | The Open Group Website, Section 3.3.5 Architecture to Support Project.