Key Principle: Refine the Product Backlog
Backlog refinement is crucial for effective sprint planning and development work.
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After the product backlog is initially populated, it needs to be “refined” on an ongoing basis so that each PBI contains enough detail to support effective sprint planning and development work. I typically want to see about two sprints’ worth of fully refined PBIs in the backlog at all times, not including the work in the current sprint.
Insufficient backlog refinement can cause a number of significant problems for the Agile ...