Quantitative Risk Assessment (QRA)

Quantitative Risk Assessment (QRA) systematically estimates the likelihood and consequences of hazardous events, including fires, explosions, and toxic releases. QRA provides a robust, data-driven basis for managing safety, environmental, and economic risks in high-hazard industries, supporting ALARP demonstration and informed decision-making.

Service information

Advise on suitable assumptions and rulesets tailored to site context
Identify and characterise hazards using HAZID, HAZOP, and desktop methods using design documentation (e.g. P&IDs, PFDs, H&MB)
Use consequence modelling to predict the physical effects of hazardous releases and events
Determine event frequencies using fault tree analysis, event trees, and historical failure data where appropriate
Develop geographic risk profiles and risk contours to visualise risk distribution within the facility and surrounding areas
Quantify individual risk per annum (IRPA), potential loss of life (PLL), and societal risk using metrics
Apply risk matrices and tolerability criteria to evaluate safety, environmental, and economic risks
Interrogate results to identify key risk drivers and potential improvements
Perform cost-benefit analyses to support ALARP assessments, referencing HSE ALARP guidance
Conduct sensitivity studies and uncertainty analyses to understand cliff-edge effects and model robustness
Address facility siting risks, including occupied building risk assessment (OBRA) and land use planning
Apply industry standard QRA software such as SAFETI, RISKCURVES and SHEPHERD
Provide bespoke web-based data visualisation and reporting to support decision-making, aligned with regulator and stakeholder expectations

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Quantitative Risk Assessment (QRA)

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Enquire about Quantitative Risk Assessment (QRA)

Related Articles

Inherently Safer Design: What, When and Why?

Related Courses

Bowtie Risk Management

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Quantitative Risk Assessment (QRA)

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