敏捷是在不确定和动荡的环境中创造和响应变化以取得成功的能力。敏捷软件开发不仅仅是 Scrum、极限编程或功能驱动开发 (FDD) 等框架。敏捷软件开发不仅仅是结对编程、测试驱动开发、站立会议、规划会议和冲刺等实践。敏捷软件开发是基于敏捷宣言中表达的价值观和原则的一组方法和实践的总称。通过自组织、跨职能团队之间的协作，利用适合其环境的适当实践，解决方案不断发展。 （来源：www.agilealliance.org）

The following 12 principles are based on the Agile Manifesto:

1. Our highest priority is to satisfy the customer through early and continuous delivery of valuable software.

2. Welcome changing requirements, even late in development. Agile processes harness change for the customer’s competitive advantage.

3. Deliver working software frequently, from a couple of weeks to a couple of months, with a preference to the shorter timescale.

4. Business people and developers must work together daily throughout the project.

5. Build projects around motivated individuals. Give them the environment and support they need and trust them to get the job done.

6. The most efficient and effective method of conveying information to and within a development team is faceto-face conversation.

7. Working software is the primary measure of progress.

8. Agile processes promote sustainable development. The sponsors, developers, and users should be able to maintain a constant pace indefinitely.

9. Continuous attention to technical excellence and good design enhances agility.

10. Simplicity – the art of maximizing the amount of work not done – is essential.

11. The best architectures, requirements, and designs emerge from self-organizing teams.

12. At regular intervals, the team reflects on how to become more effective, then tunes and adjusts its behavior accordingly.