Know Your Onions

We’ve been commissioned to develop a set of cards based on the Initiating Events (IE) and Independent Protection Layers (IPL) from the AIChE – American Institute of Chemical Engineers CCPS LOPA Book (Layer of Protection Analysis: Simplified Process Risk Assessment) which has been industry best practice for over 20 years. The following references have been operationalised &Continue reading “Know Your Onions”


Simple Layer of Protection Exercise The CCPS book “Layer of Protection Analysis: Simplified Process Risk Assessment” has been the definitive reference for performing Layer of Protection Analysis (LOPA) since it was published in 2001. LOPA is a simplified form of risk assessment which typically uses order of magnitude categories for Initiating Event Frequency (IEF), ConsequenceContinue reading “SLOPE”