SIL Determination
ESC’s expert consultants can lead and facilitate Hazan Analysis (HAZAN) workshops, including SIL Determination (Targeting) studies as part of the risk analysis process detailed in IEC 61508 / IEC 61511.
The output of HAZOP / PHA / HAZID studies can be quantitatively or (semi- quantitatively) analysed, typically using LOPA (Layer of Protection Analysis), calibrated risk graph and Fault Tree techniques to identify SIL targets.
The ALARP (As Low as Reasonably Practical) principles can be applied when appropriate. Each method can be used in assignment of SIL targets and can be calibrated to the clients’ specific risk criteria.
