Scrum is a specific agile framework structured around time-boxed sprints (typically 1 to 4 weeks), three defined roles, five events, and three artifacts. The roles are Product Owner, Scrum Master, and Developers; the events are sprint planning, daily scrum, sprint review, retrospective, and the sprint itself; the artifacts are product backlog, sprint backlog, and increment. It was formalized by Ken Schwaber and Jeff Sutherland in the 1990s and codified in the Scrum Guide (first published 2010, most recently updated 2020). It is the dominant agile framework in industry by a wide margin and the most-commonly-misapplied.
The three roles: Product Owner (owns the product backlog and what gets prioritized), Scrum Master (facilitates the pro...