Sabeur; Welcome to ISA Connect. I echo Steve's comments and suggestions. Also, if you wish to get involved in the ISA99 committee (responsible for the 62443 standards) you can complete this form: Join A Standards Committee - ISA Regards, ...

Prabhat - I supported 16 onshore Oil & Gas producing facilities previously. Here's the summary: When I 1st got there we did not have any PHA / LOPAs or SIL Calcs. So we reviewed C&E's and flagged interlocks whose main purpose was preventing loss of containment. These ...

Not minimizing the threat or the severity but looking at this in some detail it appears to be (as in most IACS attacks?) more of utilizing the existing functionalities of the PLC and its EWS. Changing of ladder logic and asset names are a standard feature of any EWS as we all ...

if they have other IPLs that should react prior to SIF engaging, the demand rate should be 1/100 yrs or lower. BMS designs are one of the few where other preventative IPLs are not typically possible. So initial failure rate = BMS SIF demand rate. but, would expect at least ...

Hey Ashraf, I imagine you already look at this official self-paced modular training (IC33M): https://www.isa.org/products/assessing-the-cybersecurity-of-new-or-existing-2 Aside than that, I'm not sure how to guide you. Regards, ------------------------------ Christiam ...