The IEC 61511 / ISA 84 Approach to Functional Safety - ChemInnovations 2010
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IEC 61511 and ISA 84, the modern functional safety standards for the process industries, are based on the concept of a safety instrumented function (SIF). Considering safety functions independently ...
IEC 61511 and ISA 84, the modern functional safety standards for the process industries, are based on the concept of a safety instrumented function (SIF). Considering safety functions independently from each other isn't all that new, but taking a SIF-based approach to functional safety lifecycle management provides exceptional benefits in the analysis, implementation, and operation phases of a safety instrumented system. The IEC 61511 approach enables more practical safety lifecycle management, ensuring that just the right amount of technology, complexity, and effort is applied where it is needed. The result of this kind of approach is optimal safety reliability, reduced total lifecycle cost, and better protection against systematic failures that can disable even the most well designed SIL 3 rated safety instrumented system.
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