for the purpose of controlling changes to those components and maintaining continuity and traceability throughout the life cycle
　　为了在生命周期全过程中控制组件的变化（硬件和软件）和保持连续性和可追溯性CONTROL ENGINEERING China版权所有，对进化系统（硬件和软件）中组件的识别规则。
　　控制系统 control system
　　system which responds to input signals from the process and/or from an operator and generates output signals causing the process to operate in the desired manner
　　对来自过程和/或操作员的输入信号进行响应www.cechina.cn，并产生使过程按要求方式运行的输出信号的系统。
　　危险失效 dangerous failure
　　failure which has the potential to put the safety instrumented system in a hazardous or fail-to-function state
　　可能使安全仪表系统潜在地处于某种危险或功能丧失状态的失效。
　　相关失效 dependent failure
　　failure whose probability cannot be expressed as the simple product of the unconditional probabilities of the individual events which caused it
　　其概率不能表示为引起失效的独立事件的无条件概率的简单乘积的失效。
　　检测到的 detected
　　揭露的 revealed
　　明显的 overt
　　in relation to hardware failures and software faults控制工程网版权所有, detected by the diagnostic tests or through normal operation
　　在与硬件失效和软件故障有关时，通过诊断测试或正常操作发现的。
　　装置 device
　　functional unit of hardware or software, or both, capable of accomplishing a specified purpose
　　能实现某个规定目的的硬件或软件或者二者结合的功能单元
　　诊断覆盖率（DC） diagnostic coverage (DC)
　　ratio of the detected failure rate to the total failure rate of the component or subsystem as detected by diagnostic tests. Diagnostic coverage does not include any faults detected by proof tests.
　　诊断测试检测到的部件或子系统的失效率与总失效率之比。诊断覆盖率不包含由检验测试检测到的任何故障。
　　多样性 diversity
　　existence of different means performing a required function
　　执行一个要求功能存在不同方法。
　　电气/电子/可编程电子（E/E/PE）
　　electrical/electronic/programmable electronic
　　based on electrical (E) and/or electronic (E) and/or programmable electronic (PE) technology
　　基于电气（E）和/或电子（E）和/或可编程电子（PE）技术。
　　误差 error
　　discrepancy between a computed控制工程网版权所有, observed or measured value or condition and the true, specified or theoretically correct value or condition
　　计算出的、观测到的和测量到的值或条件控制工程网版权所有，和真实的、规定的或理论上正确的值或条件之间的差异。
　　外部风险降低设施 external risk reduction facilities
　　measures to reduce or mitigate the risks, which are separate and