Our Stories

A collection of our Blogs, Articles, and Whitepapers

Key Considerations Establishing Site or Corporate SIS Guidelines

Key considerations to developing SIS guidelines, with the SIS lifecycle generalized into three main sections: Concept Through Startup, Opera

The Purpose of Performing a PHA - 2 Minute Topic

The ISA/IEC 61511 Safety Life Cycle starts with a Process Hazard Analysis (PHA) and a Risk Assessment. What is a PHA? Why do we do it?...

Challenging Safety Metrics in Process Industries: A Bayesian Perspective on Layer of Protection Analysis (LOPA)

The process industry uses Layer Of Protection Analysis (LOPA) to document extremely small probabilities for catastrophic events....

The use of Bayesian Networks in Functional Safety - Whitepaper

Functional safety engineers follow the ISA/IEC 61511 standard and perform calculations based on random hardware failures. These result in...

Can we achieve Safety Integrity Level 3 (SIL 3) without analyzing Human Factors?

Incorporate quantitative Human Factors into a SIL analysis. Representative operating units at various stages of maturity in human factors an

What is Truth? Do SIL Calculations Reflect Reality?

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 – Do our SIL calculations Reflect Reality?

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

The Use of Bayesian Networks in Functional Safety

Functional Safety & Bayesian Networks Functional safety engineers fol low the ISA/IEC 61511 standard & perform calculations based on...

What can go wrong with a functional safety assessment, and how to ensure one goes smoothly?

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

How About a Stage Zero Functional Safety Assessment (FSA)?

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