The next Sprint begins immediately after the conclusion of the previous Sprint, as stated in the Scrum Guide: "Sprints have consistent durations throughout a development effort. A new Sprint starts immediately after the conclusion of the previous Sprint."

A Product Backlog item is considered complete when it meets the Definition of Done, as stated in [5]: "When a Product Backlog item or an Increment is described as "Done", everyone must understand what "Done" means. Although this varies significantly per Scrum Team, members must have a shared understanding of what it means for work to be complete, to ensure transparency. This is the definition of "Done" for the Scrum Team and is used to assess when work is complete on the product Increment."

According to the Scrum Guide, the Sprint Backlog is the Developers' plan for the Sprint, as it contains all the Product Backlog items selected for the Sprint and a plan for delivering them. The other options are not valid descriptions of the Sprint Backlog, as they are either incorrect (such as having a designated owner, being ordered by the Product Owner, or being a complete list of all work) or unnecessary (such as estimating each task in hours).

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