包含用于在定义的使用条件下在定义的时间内定性和定量实现技术设备功能的特征值。功能安全性可以通过（其中包括）可靠性和可用性来描述。
Comprises characteristic values for qualitative and quantitative fulfilment of the function of a technical device under defined application conditions over a defined period of time. The functional safety can be described by - among other things - the reliability and availability.
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