Our Stories

A collection of our Blogs, Articles, and Whitepapers

Using Small Data to Support Decision Making When LOPA Fails

Data is needed to confidently claim a parameter value, starting with an assumed or generic value, and periodically updating that value with

Recording - Quantifying the “Qualitative”: Assigning Confidence Levels to Low-Probability Events

Process Safety makes numerous calculations related to the likelihood of rare events, including for example SIL calculations, LOPA...

Designing Operator Tasks to Minimize the Impact of Heuristics and Biases

This paper proposes a combined approach of discussing the cognitive psychology behind System 1 and System 2 thinking, the types of heuristic

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...

Improving Human Factors Review in PHA and LOPA

Having a working knowledge of these five tools will improve a PHA‐LOPA facilitator’s awareness and ability to better evaluate human error re

Reverend Bayes, Meet Process Safety-Use Bayes’ Theorem to Establish Site Specific Confidence in LOPA

Bayes’ Theorem is sorely missing from the toolbox of Process Safety practitioners. This paper will introduce Bayes’ Theorem to the reader an

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

Accounting for Emergent Failure Paths in LOPA

Application of one such system technique known as “NET-HARMS” (Networked Hazard Analysis and Risk Management System). The NET-HARMS techniqu

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

Understanding Overpressure Scenarios and RAGAGEP

Introduction to Using RAGAGEP for Overpressure Risk Mitigation