The Agile Manifesto is a short set of values and principles for software development, written in 2001 by a group of developers who wanted a more flexible alternative to heavy, document-driven processes. Its phrases are often quoted in training courses, workshops and team talks, and short readings of them circulate online as study aids and presentation clips. This entry is the fourth phrase in one such series, numbered for easy reuse in sequence. Because it is only a little over a second long, it is most useful as a recognisable marker rather than a standalone lesson.