Adaptive Software Development (ASD) is a direct outgrowth of an earlier agile framework, Rapid Application Development (RAD). It aims to enable teams to quickly and effectively adapt to changing requirements or market needs by evolving their products with lightweight planning and continuous learning. The ASD approach encourages teams to develop according to a three-phase process: speculate, collaborate, learn.
Adaptive Software Development: A Collaborative Approach to Managing Complex Systems (Dorset House eBooks)
by Highsmith III, James