Safety Analysis according to IEC 61508 - Putting it into Practice

摘要

Since its finalisation in 2000, IEC 61508 has become very popular and its publication represents a major step forward. When implementing this safety standard, however, the user is faced with a number of challenges and ambiguities, which are already under consideration by maintenance teams within the IEC, namely the absence of a harmonised approach to risk analysis, confusion due to the existence of two different operation modes and the verification of the underlying modelling assumptions for quantitative safety integrity analysis. This paper discusses these issues and provides suggestions for their rectification.