Agile software development is a group of software development methods in which requirements and solutions evolve through collaboration between self-organizing, cross-functional teams. It promotes adaptive planning, evolutionary development, early delivery, continuous improvement, and encourages rapid and flexible response to change.
The Manifesto for Agile Software Development,[1] also known as the Agile Manifesto, which first laid out the underlying concepts of agile development, introduced the term in 2001.