As a Basic Safety Publication, changes in IEC 61508 will have an impact on application specific standards and the development of new products. This presentation gives an overview of the planned modifications and highlights the most important parts and their possible impact on current and future developments.
The 3rd edition of IEC 61508 clarifies the differences between the required Safety Integrity Level (SIL) and the achieved Systematic Capability (SC). It adds in part 1 requirements on functional safety audits and on levels of independence for functional safety assurance activities. Part 2 will add requirements on diagnostic functions and modify requirements for the treatment of common cause failures. Part 3 incorporates the requirements of IEC TS 61508-3-1, requires a software safety analysis and modifies requirements for software off-line support tools.
Besides the planned changes in IEC 61508, this presentation will also introduce the new subparts IEC 61508-2-1 and IEC TR 61508-6-1.