Research on concept and allocation principle of safety integrity level
YAN Fei
TANG Tao
YAN Hongwei
Abstract：The Safety Integrity Level(SIL) is an important concept for safety related system to identify safety requirements.It is classified by the severity and frequency of the accidents caused by the failure of safety system.When designing and developing rail traffic safety related products,it is necessary to determine the developing team,their design methods and safety measures according to the level of SIL.Currently,there is some misunderstanding of the application of SIL concept in domestic rail transit industry.For example,some believe that the higher the level of SIL the better the product will be,and some describe a product or system as meeting the requirements of certain SIL.This paper describes the definition of SIL using international rail transit standard.It clarifies some incorrect use of the concept of SIL and introduces the definition,classification and determination methods of SIL,which includs quantitative and qualitative methods.Finally the paper illustrates these methods through application cases.
Keywords：safety integrity levelsafety assessmentrisk analysisrail transit
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 79-84 )