无论你选择哪种方法，质量保证是一个重复过程，甚至很小的变化就会有切实的不同。
No matter which approach you choose, quality assurance is an iterative process in which even small changes can make a tangible difference.
将这些应用程序迁移到GAE可能是昂贵的，因为您不仅需要识别问题并创建解决方法，而且还要从头再为整个应用程序做质量保证。
Migrating those applications to GAE might be costly, because you not only need to identify the issues and create workarounds, but also do quality assurance for the entire application all over again.
这种自动化过程指导使软件开发的最佳实践具体化，这些最佳实践包括迭代化方法、变更管理、可视化建模和持续质量保证过程。
This automated process guidance embodies software development best practices, including an iterative approach, change management, visual modeling, and continuous QA procedures.
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