The Agile Manifesto, its 4 values and 12 Agile Principles, were the consequences of industry frustration in the 1990s about the time lag between business requirements and the delivery of technology. Business and customer requisites changed during this lag time, and the final product did not meet the then current needs.
“We are uncovering better ways of developing software by doing it and helping others do it. Through this work we have come to value:
Individuals and interactions OVER processes and tools
Working software OVER comprehensive documentation
Customer collaboration OVER contract negotiation
Responding to change OVER following a plan
That is, while there is value in the items on the right, we value the items on the left more.”
The 12 Agile Principles included in the Agile Manifesto describe a culture in which change is welcome, and the customer is the focus of the work.