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Webinar Recordings

A Tale of Two BPCS Credits,
A Bayesian Case Study

This case study examines the approach used for one client to justify two risk reduction credits on their robust BPCS interlock in two basic steps. The first step was to decide a reasonable probability of failure using a Failure Mode and Effects Analysis technique (FMEA). All relevant failure modes including the ubiquitous human component were examined. Next, plant operating history was reviewed and applied in a Bayesian analysis to determine the upper credibility (confidence) limit. The overall FMEA and Bayesian analysis process, including the "why," "how," and results will be provided. Presented by Keith Brumbaugh, P.E., CFSE • Principal Specialist - SIS FEL

Identifying System Level Failures Using STPA Before They Occur

The new hazard analysis method known as STPA - Systems Theoretic Process Analysis - and how it can help prevent accidents in the non-routine, abnormal, and transient operating states. Presented by Dave Grattan PE, CFSE.

Best Practices to Ensure My Risk Assessment is Trustworthy

Part 3 of Trustworthy Risk Assessments, QRA, and Data Validation in Process Safety One of the most powerful features of the Safety Life Cycle (SLC) is validation of the Risk Assessment with actual performance data; this is the ‘cyclic’ aspect of the SLC. One of the largest sources of error in a Risk Assessment is applying generic “industry” data without validation, which can increase the frequency of incidents or the cost of controlling hazards. This final webinar of our three-webinar series shows how to leverage qualitative and quantitative methods to update Risk Assessment data including using probability distributions and confidence intervals. Presented by Dave Grattan PE, CFSE

Capabilities of Quantitative Risk Assessment and Its Applications 

Part 2 of Trustworthy Risk Assessments, QRA, and Data Validation in Process Safety: Quantitative Risk Assessment (QRA) represents the "sharpest pencil" in the Risk Assessment tool kit for quantifying risk and crediting safeguards for risk reduction. In this second webinar of our three-part series we present applications for QRA, its utility for modeling dependencies, conditions where QRA provides value over other risk assessment techniques, and application of QRA in Bowtie Analysis. Presented by Joe Veasey PE, CFSE

Choosing a Risk Assessment Methodology

Part 1 of Trustworthy Risk Assessments, QRA, and Data Validation in Process Safety The ANSI/ISA 61511 Safety Life Cycle starts with a Process Hazard Analysis (PHA) and a Risk Assessment. This first webinar of our three-part series details the purpose of Risk Assessment and examines the advantages and limitations of various methodologies including Risk Graph, Layer of Protection Analysis (LOPA), Quantitative Risk Assessment (QRA), and others. Presented by Joe Veasey PE, CFSE

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