Projects are affected by time constraints, cost, scope, quality, resources, organizational capabilities, and other limitations that make them difficult to plan, execute, manage, and finally succeed.
Agile is the ability to create and respond to change. It is a way of dealing with, and ultimately succeeding in, an uncertain and turbulent environment.
The authors of the Agile Manifesto chose "Agile" as the label for this whole idea because that word represented the ability to adapt and the response to change that was so important to their approach.
Fuente:
https://www.agilealliance.org/agile101/agile-glossary/

Author: Dave Snowden