不存在缺失功能性的风险。

There is no risk of losing functionality.

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这种最佳的操作允许您基于测试用例的复杂性、风险以及功能性区域来安排它们的优先级，来建立关于测试将要持续多久的质量估计。

This best practice allows you to prioritize test cases based on their complexity, risk, and functional area, which will create a quality estimate about how long the testing will take.

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功能上的风险也许与项目涉众为关键的功能性提供了模糊的需求或者几个需求对项目系统都是核心的有关。

Functional risks might relate to areas in which stakeholders have provided fuzzy requirements for critical functionality, or to several requirements that are core to the system.

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