Overview
Read this article from a comprehensive knowledge base, updated and supplemented with articles reviewed by scientific committees.
Read the articleAUTHOR
-
Olivier IDDIR: Project Engineer, Expertise and Modeling Department, QHSES Division, Technip
INTRODUCTION
Assessing the SIL level of safety instrumented functions (SIF) is an essential step in the design of Safety Instrumented Systems (SIS). The IEC 61508 and IEC 61511 standards now constitute a normative frame of reference that can be used not only during the design phase, but also throughout the life cycle of a SIS. In order to use these standards wisely, and to correctly estimate the SIL level, it is necessary to master essential concepts such as :
What's the difference between SIS and SIF?
What is the SIL level?
What is the link between probability of failure and SIL level?
What lies behind the notion of redundancy?
The Ultimate Scientific and Technical Reference
This article is included in
Environment
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
SIL level assessment of Safety Instrumented Functions (SIF) – Essential concepts
What are the differences between a SIS and a RIS?
Bibliography
Also in our database
Bibliography
Olivier Iddir – Principle for assessing the probability of failure of risk control measures. [SE 4 057] Safety and risk management (2009).
Olivier Iddir – LOPA method: principle and example of application. [SE 4 075] Safety and risk management (2012).
Tool
The Ultimate Scientific and Technical Reference
