Some non-functional requirements like evolvability can be verified through analysis methods like SAAM[2], while some others like usability and performance can be validated by testing.

• 一些像可演化性这样的非功能性需求能够通过分析模型来验证，例如SAAM。而另一些像可用性以及性能这样的需求则能够用测试来确定。