How and when do you identify safety instrumented functions (SIFs)? Should you first perform a hazard operational analysis (HAZOP) or select a safety integrity level (SIL)? These are questions members of the ISA Safety Division list serve discussion forum are bouncing around, especially with respect to conformance to the safety standard, ANSI/ISA 84.00.01-2004 (IEC61511 mod). Some responses reinforce myths we need to dispel about selecting SILs.
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机译：您如何以及何时识别安全仪表功能（SIF）？您应该首先执行危害操作分析（HAZOP）还是选择安全完整性等级（SIL）？这些是ISA安全部列表服务讨论论坛上正在讨论的问题，尤其是关于符合安全标准ANSI / ISA 84.00.01-2004（IEC61511 mod）的问题。一些回应强化了我们必须消除有关选择SIL的神话。
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