According to Scott W. Ambler, respected authority in the agile methods
community, agile software development is an iterative and incremental
(evolutionary) approach to software development which is performed in a highly
collaborative manner with "just enough" ceremony that produces high quality
software which meets the changing needs of its stakeholders. Agile methods refer to
a collection of "ligthweight" software development methodologies that are basically
aimed at minimising risk and achieving customer satisfaction through a short
feedback loop.