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What is the difference between backlog refinement and sprint planning?

Backlog refinement prepares work: clarifying, splitting and estimating upcoming items so they are ready. Sprint planning selects work: choosing which ready items fit this sprint's capacity and writing the sprint goal. Refinement answers 'is this understandable?'; planning answers 'does this fit?' — merging them makes both worse.

Why they get merged, and why that hurts

Small teams collapse the two because both involve looking at the backlog. The result is a two-hour planning meeting where the whole team watches one person write acceptance criteria. Refinement is preparation work that a subset can do; planning is a decision the whole team must make together.

What refinement actually produces

A refined item has a clear title, enough description that the team can estimate it, a size, and no obvious hidden dependency. Refinement also splits anything above your split threshold and deletes items that no longer matter. Its output is a top-of-backlog that is safe to plan from.

What planning actually produces

A sprint with a goal, a set of scoped items, and a point total at or below velocity. Nothing gets written during planning; if an item needs writing, it was not ready and it goes back. That single rule is what keeps planning to thirty minutes.

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Related questions

Who should attend refinement?

Whoever can clarify and size the work — typically the backlog owner plus one or two engineers, rotating. It does not need the full team, which is exactly why keeping it separate from planning saves everyone time.

How far ahead should we refine?

One to two sprints. Refining further ahead is speculative work that usually gets rewritten, and refining less means planning stalls on unclear items.

Is refinement the same as grooming?

Yes — 'refinement' is the current term and 'grooming' the older one for the same activity. Some organisations moved away from 'grooming' purely for language reasons; the practice is identical.

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