Guidance on safety integrity level (SIL) determination considers the required performance of the safety instrumented function (SIFs) to be implemented by protection systems to prevent specific hazardous events or to mitigate the consequence of those hazardous events. SIL targeting is usually determined by adopting a risk-based approach either quantitatively, qualitatively or a mixture of both. The publication recognizes that there should be a balanced approach to risk management starting with adoption of inherently safer design principles, with elimination of hazards as the first priority. Practically, it builds on IEC 61511 by in-filling the requirements of the standard with user experience and worked examples. This document provides guidance on safety integrity level (SIL) determination in the context of IEC 61511 for the process industries, such as the energy industry and chemical manufacturing industry. DrDavid J Smith, Kenneth GL Simpson, in The Safety Critical Systems Handbook (Fourth Edition), 2016 8.6 Energy Institute: Guidance on Safety Integrity Level (SIL) Determination, Expected to be Published 2016
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