Human Factors Engineering

Behavior-Based Safety Process (BBSP) and Incident Management

One of the most prominent mistakes organizations make when implementing their Behavior-Based Safety Process (BBSP) is that they still operate under 1990s-era assumptions regarding how they view and manage incident reporting and investigation and the behaviors of personnel involved in those undesired events. An improperly implemented and managed BBSP can create numerous biases, with the […]

Consider Human Error and Domino Effects (EPSC Learning Sheet July 2025)

At an Ethylene unit in the Czech Republic (2015), when swapping over cooling water supply lines during a flowmeter calibration, the operator made a simple mistake. While intending to open valve #3 on the spare supply line, he closed the identical valve #2 instead, shutting off all cooling water to the Light Ends columns. A

Temporary SOP, Car Seals or BOTH?

What would you require for this bypass around a safety critical valve? Temporary SOP, Car Seals or BOTH? The automated valve is the Emergency Shutoff Valve tied to a Hi-Hi Interlock on an above-ground atmospheric flammable liquid storage tank. The LOPC/Over-Fill event occurred because the worker filling the tank was “shorthanded” that day and had

Learning Human Factor mistakes from others

The PSM standard requires the employer’s PHA team to evaluate human factors during its process hazard analysis. CCPS defines human factors as “a common term given to the widely-recognized discipline of addressing interactions in the work environment between people, a facility, and its management systems.” The basic principle of assessing human factors is to determine

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