In Scrum, you develop product increments in short iterations called sprints. The sprint is a very central concept in Scrum: everything revolves around it.
In this post I talk about sprint length, preconditions for a successful sprint, and what to do when a sprint falters.
Each sprint starts with a planning event which I covered in an earlier post. The sprint ends with two other meetings: the sprint review and the sprint retrospective. Those will be covered later. These three events are part of the sprint, and make out the sprint boundaries.