principle 5 : don’t try to retrofit quality
Quality cannot be retrofit into software .This applies to any definition of quality: maintainability, reliability, adaptability, testability, safety, and so on. We have a very difficult time building quality into software during development when we try to. How can we possibly expect to achieve quality when we don’ t try? This is primarily why you must not try to convert a throwaway prototype into a product(Principle 11).
质量是不能通过翻新改进软件来保证的，这适用于所以对于质量的定义:可维护性、可靠性、适应性、可测试性、安全性等等。在开发过程中，我们很艰难的在软件中建立起了质量。所以，当我们不去尝试在构建软件时建立质量，又怎么可能期望达到高质量呢?这就是为什么你不能尝试将一个一次性的原型转换成一个真实产品的原因。(原则11)。
