Human Factors Engineering

Here’s a safety formula you won’t see on the ASP/CSP/CIH/PE exam, but it may be the most influential for a safety professional to know: B = f(P, E)

Kurt Lewin’s Behavioral Theory from the 1940’s can be summarized as B = f(P, E). This means that Behavior is a function (f) of:1) the person (P) (i.e., their internal traits, history) and2) their environment (E) (i.e., physical, social, and psychological) This means unsafe acts should NOT be blamed solely on the individual; they are […]

Work-as-Done vs Work-as-Imagined

Many safety management systems are initially developed in a theoretical environment or for ideal situations with implicit and explicit assumptions about the system’s optimal performance, equipment, and human activities. This is often called WORK-AS-IMAGINED and is formally documented in training, procedures, and equipment operating manuals. Differences between the designed performance or WORK-AS-IMAGINED and the realities

Performing a Human Reliability Assessment (HRA)

This information is intended to assist in assessing the human contribution to risk, commonly known as Human Reliability Assessment (HRA).  There are two (2) distinct types of HRA: qualitative assessments that aim to identify potential human failures and optimise the factors that may influence human performance, and quantitative assessments which, in addition, aim to estimate

Human Errors and lack of verification leads to Hydrogen Tube Trailer Fire (2K evacuated & $175K in damages)

The NTSB has determined that the probable cause of the 2018 Hydrogen tube trailer fire in California was human errors made by two non-related personnel from two different companies with both workers making errors on the pressure relief system: REQUALIFICATION TECHNICIAN’S installation of an INCORRECTLY RATED PRESSURE RELIEF DEVICE in cylinder No. 14, which actuated

You will not stop all human error

You will not stop all human error, but you can work on why those errors occurred and reduce the frequency, severity, and likelihood of humans to make similar mistakes. Trace the triggers backward and you’ll find a cause. “Be more careful and pay attention” are not root causes. Quit fooling yourself! #safety #goallin #fixtheculture #growyourteam

Human Factors 101 – #1001

I am not sure why I am so fascinated with the Human Factors aspect of process safety, but I blame my pals Bob and Steve at Unwin Company for beating it into my head during the first PHA I did with them way back in 1999.  They ripped me apart with how our procedures were

Human Factors 101 – #1001

I am not sure why I am so fascinated with the Human Factors aspect of process safety, but I blame my pals Bob and Steve at Unwin Company for beating it into my head during the first PHA I did with them way back in 1999.  They ripped me apart with how our procedures were

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