Appendix 8
Some Terms and Jargon of IEC 61508
The seven “Parts” of IEC 61508 are described as “normative”, which means they are the Standard proper and contain the requirements which should be met. Some of the annexes, however, are described as “informative” in that they are not requirements but guidance which can be used when implementing the normative parts. It should be noted that the majority of Parts 5, 6, and 7 of the Standard are informative annexes.
A few other terms are worth a specific word or so here:
Functional safety is the title of this book and of IEC 61508. It is used to refer to the reliability (known as integrity in the safety world) of safety-related equipment. In other words it refers to the probability of it functioning correctly, ...
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