Our Stories

A collection of our Blogs, Articles, and Whitepapers

LOPA Independent Protection Layers- Common Pitfalls in IPL Selection

Those who work in high hazard industries are familiar with the OSHA Process Safety Management (PSM) requirements for routine Process...

Does Your Facility Have the Flu? Use Bayes Rule to Treat the Problem Instead of the Symptom

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

Does Your Facility Have the Flu? Use Bayes Rule to Treat the Problem Instead of the Symptom

Is our industry addressing the problems facing it today? We idealize infinitesimally small event rates for highly catastrophic hazards,...

Improving Barrier Effectiveness using Human Factors Methods

by Dave Grattan The Process Industry has an established practice of identifying barriers to credit as IPLs (Independent protection...

Methodologies in Reducing Systematic Failures of Wired IPLs

by Richard E. Hanner & Tab Vestal The history of high consequence incidents in industry reveals that most accidents were the result of...

Conducting a Human Reliability Assessment to support PHA and LOPA

This paper will present an overview of the HRA methodology, worksheets used to develop and document the HRA, examples of HR Event Trees, a m

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

Reducing Systematic Failures - Process Safety Management PSM

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.

Independent Protection Layers…Will they work when needed?

Layer of Protection Analysis (LOPA) has become an important tool used in industry, often in conjunction with a Process Hazard Analysis...