planning

Scrum's planning elements provide for a view of what will be undertaken in the next Sprint, and a longer range view of the backlog items which may be undertaken over time.

roles

Scrum specifies only three roles, Product Owner, ScrumMaster and Development Team Member. Individuals bring different skills and concerns to these roles.

sprints

Scrum teams build the product in "Sprints", time-boxed intervals typically one to four weeks in duration. The team produces a complete product increment in each Sprint.