Individuals and interactions over processes and tools and we have mandatory processes and tools to control how those individuals (we prefer the term ‘resources’) interact

Working software over comprehensive documentation as long as that software is comprehensively documented

Customer collaboration over contract negotiation within the boundaries of strict contracts, of course, and subject to rigorous change control

Responding to change over following a plan provided a detailed plan is in place to respond to the change, and it is followed precisely

From: http://www.halfarsedagilemanifesto.org/