Timeboxed

Sprints are rooted in the concept of timeboxing, a time-management technique that helps organize the performance of work and manage scope. Each sprint takes place in a time frame with specific start and end dates, called a timebox. Inside this timebox, the team is expected to work at a sustainable pace to complete a chosen set of work that aligns with a sprint goal.

Timeboxing is important for several reasons (see Figure 4.2).

Figure 4.2. The benefits of timeboxing

Establishes a WIP Limit

Timeboxing is a technique for limiting the amount of WIP (work in process). WIP represents an inventory of work that is started but not yet finished. Failing to properly manage it can have serious economic consequences. Because the team will plan to work on only those items that it believes it can start and finish within the sprint, timeboxing establishes a WIP limit each sprint.