The Product Backlog is one of the primary artifacts in Scrum. Each item in the Product Backlog is called a Product Backlog Item (PBI). Each of these items could be a
- Functional requirement
- Non-functional requirement
- Change Request
and anything that impacts the product that goes into the Product Backlog.
The whole Scrum Team (Product Owner, Development Team, and the Scrum Master) collaborates to add more details to the top priority Product Backlog Items. We call this Product Backlog refinement.
The purpose of this activity is to have just enough details for PBIs for the first few sprints. Refinement is an ongoing activity that should happen in every Sprint, as Scrum suggests.
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