Our Stories

Effective Process Hazard Analysis (PHA) facilitators combine soft skills with technical knowledge to guide PHA teams through a thorough iden

Introduction to Using RAGAGEP for Overpressure Risk Mitigation

A systematic database approach can be used to design, develop and test a Safety Instrumented System (SIS) using methodologies that are in co

Are random hardware failures the only thing that cause a safety instrumented function (SIF) to fail? What if our assumptions are wrong? What

Functional safety specialists may be stuck in the past and doing industry a disservice. The current industry trend is to only consider rando

The benefit of such studies is that it’s easier and less expensive to make necessary changes to systems while the design is still on paper.

Functional Safety & Bayesian Networks Functional safety engineers fol low the ISA/IEC 61511 standard & perform calculations based on random hardware failures. These result in low failure probabilities, which are then combined with similarly low failure probabilities for other safety layers, to show that the overall probability of an accident is extremely low (e.g., 1E-5/yr). Unfortunately, such numbers are based on frequentist assumptions and cannot be proven. Looking at act

What might go wrong with an FSA, and what might you do to ensure that an FSA runs smoothly?

Inspired by “Conducting an Effective Functional Safety Assessment” presented at 2019 ISA PIC 2019—Process Industry Conference. by Greg...

Industry uses many numbers in process safety associated with predicting the likelihood of rare, catastrophic events (e.g., failure rates, de