5. Safety
Safety is defined as the ability of a device not to cause critical or catastrophic events, injuries, or damage to health.
When quantifying this parameter, this capability is expressed as the probability that the system will avoid critical, catastrophic, or physically damaging events.
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The concept of safety is closely linked to that of risk. The risk associated with critical events is, in fact, a function of two parameters: the severity of the damage and the probability of that damage occurring (or of the event causing the damage occurring).
In the space divided into two zones, "acceptable" and "unacceptable," Figure 4 shows that an event A (a failure, for example),...
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