Posts by aeSolutions :

May 28, 2019

Thank you ! – Making It Real

Thank you to all who attended our Industrial Process Integrity Seminar, Making It Real. And thanks to the partners and vendors that helped make it such a success. Check out our Events page to see your next opportunity to meet one of our experts in person.

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April 17, 2019

Updated 5/20: aeSolutions is excited to be hosting ISA Houston Section’s May Cyber Camp

We were thrilled with the overwhelmingly enthusiastic response we had for these aeSolutions hosted classes which were taught by 3 different instructors. The original post with event details is archived below. “Thanks to the students whose active participation in the class made it successful!  I thoroughly enjoyed teaching the class and was pleasantly surprised how […]

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April 1, 2019

Managing the Risk of IT-OT Convergence

Whether we like it or not — Information Technology (IT) and Operational Technology (OT) are converging.  In fact, most would say they already have converged to a large degree and this will continue until they are almost indiscernible in terms of the underlying technology.  While the benefits are incredible, convergence means industrial control systems (ICS) […]

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February 6, 2019

S4: Getting a Handle on Consequences

John Cusimano, vice president of cybersecurity at aeSolutions, was recently featured in a panel at the S4X19 conference exploring the strengths and benefits of conducting a Cyber Process Hazard Analysis (CyberPHA) or Consequence-driven Cyber-informed Engineering (CCE) process.  A recent article on highlighted some takeaways from that panel:   “In a CyberPHA we leverage processes […]

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January 18, 2019

ISA welcomes aeSolutions’ Paul Gruhn as its 2019 Society President

The International Society of Automation (ISA) announced that Paul Gruhn, PE, CFSE, and ISA Life Fellow, is its 2019 Society President. In his role as Society President, Gruhn will lead the ISA Board of Directors, which is responsible for governing, setting policy and establishing the strategic direction of the organization. ISA is a nonprofit professional […]

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White Papers by aeSolutions :

Risk Criteria Selection and the Impacts on LOPA Results: To Sum or Not to Sum, That is the Question

In the CCPS book Layer of Protection Analysis – Simplified Process Risk Assessment, Layers of Protection Analysis (LOPA) is initially described as the analysis of a single cause-consequence pairing. However, later in the book, there is the discussion of summing risk for multiple scenarios. In practice, several companies prefer to sum the frequencies of multiple causes leading to a single consequence when conducting LOPA. Summing the causes can be a useful tool in that it will ensure proper integrity of a safety function to address all of the causes for a single consequence and assist in the reduction of the numbers of Independent Protection Layers (IPLs) necessary at a facility. However, caution must be taken in using this method, as there may be unrealized effects on LOPA results, and therefore unintended impacts to the entire safety lifecycle. In contrast, evaluating only a single cause-consequence pair also poses different concerns when relating the results to selected risk criteria.

This paper seeks to provide insight into the effects of each choice, including the pros and cons of each method. Deeper examinations into the definitions of risk criteria and consequence are explored.

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