在软件设计中的失效评定（failure assessment）是指确认一算法在特定条件下会失败，并设法修正其失败原因的计算机科学。失效评定和算法的准确性、强健性、可靠度有直接关系。

Failure assessment, as used in the context of software systems design, is the science of determining the circumstances under which a particular algorithm fails and then correcting the cause. It is directly related to the notion of algorithm accuracy, robustness, and reliability.