Consultivo · Process Safety · IFC-Approved
QRA Consultants for Quantitative Risk Assessment
A QRA study puts numbers on the risk your plant carries. Consequence modelling, individual risk contours and F-N curves that stand up to a regulator, a lender or an insurer.
What You Get
What a QRA Study Delivers
A QRA turns qualitative hazard findings into defensible numbers, so leadership, regulators and lenders can see exactly how much risk a facility carries and whether it is tolerable.
Consequence Modelling
Release, dispersion, fire, explosion and toxic effects modelled with recognised tools such as PHAST, EFFECTS or FLACS.
Risk Contours
Individual risk contours mapped across and around the site, showing where risk levels sit against your criteria.
F-N Curves
Societal risk expressed as frequency against number of people affected, the figure siting decisions turn on.
Tolerability and ALARP
Risk ranked against tolerability criteria, with a clear view of what must be reduced and how far.
Why Consultivo
QRA Consultants Who Model, Not Just Report
Independence, modelling depth and outputs you can defend - not a box-ticking file.
IFC World Bank Group approved
The independence and rigour that development lenders and international insurers expect for a numerical risk demonstration.
Truly independent
We sell no equipment, software licences or instrumentation, so our QRA study carries no commercial bias.
Modelling depth
Our QRA consultants build the consequence and frequency models themselves, so the numbers are traceable and defensible.
Decision-ready output
Risk contours, F-N curves and a clear tolerability verdict, not a wall of unexplained figures.
Standards fluency
CCPS CPQRA practice with IFC PS3 and PNGRB expectations, aligned to ISO 31000 risk management.
India and 19+ countries
Indian statutory depth combined with international practice, across 2,000+ organisations and 20+ sectors.
Understanding The Study
What Is Quantitative Risk Assessment?
Quantitative risk assessment (QRA) is the numbers stage of process safety. It takes the hazardous scenarios a HAZOP or PHA has identified, models their consequences, estimates how often each could happen, and combines the two into a measured picture of risk to people, expressed as individual and societal risk.
Where a qualitative study tells you a scenario is serious, a QRA study tells you how serious, how likely and whether the result is tolerable. The recognised reference is the CCPS Guidelines for Chemical Process Quantitative Risk Analysis.
A QRA follows the qualitative work of our process hazard analysis consultants and hazop consultants. It is one element of a full process safety management programme.
Full form: Quantitative Risk Assessment. Inputs: HAZOP or PHA scenarios, inventories, layout, weather. Outputs: risk contours, F-N curve, tolerability verdict. Tools: PHAST, EFFECTS, FLACS.
Timing
When a QRA Study Is Required in India
A QRA is expected, and often mandatory, in several situations.
Large hazardous inventories
Sites holding toxic, flammable or explosive material above threshold quantities.
PNGRB scope
Pipelines, terminals and city gas projects under PNGRB regulation.
Lender or IFC condition
Where financing requires a numerical demonstration of individual and societal risk.
Siting near people
Facilities planned close to homes, other plants or public infrastructure.
Insurer requirement
When an insurer wants documented evidence of risk before cover.
Land-use planning
To inform separation distances and emergency planning zones.
Our Approach
How We Deliver a QRA Study
A structured five-stage approach - independent, traceable and built to give you numbers you can defend.
Scenario Selection
Take the credible release scenarios from the HAZOP or PHA and define the study basis.
Frequency Analysis
Estimate how often each scenario could occur, using recognised failure-rate data.
Consequence Modelling
Model dispersion, fire, explosion and toxic effects for each release case.
Risk Summation
Combine frequency and consequence into individual risk contours and an F-N curve.
Evaluation and Report
Rank against tolerability criteria and deliver a clear, prioritised risk-reduction plan.
Sectors We Serve
Industries That Rely on Quantitative Risk Assessment
Any facility with large hazardous inventories or a siting question needs a QRA study. Our consultants bring sector-specific modelling knowledge to each one.
What You Receive
Deliverables and Standards
Clear, defensible outputs, not just paperwork. Every QRA study comes with a management-ready report and a prioritised risk-reduction plan.
QRA study report
Scenario basis, assumptions, models and results, fully documented.
Risk contours and F-N curve
Individual and societal risk presented against your tolerability criteria.
Risk-reduction plan
Prioritised measures to bring risk within tolerable limits, with owners.
Management debrief
A clear readout of the headline risk and recommended next steps.
Standards We Work To
- CCPS - Guidelines for Chemical Process QRA
- IFC Performance Standard 3
- PNGRB regulations - India pipelines and terminals
- ISO 31000 - risk management
- OSHA 29 CFR 1910.119 - PSM standard
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Explore trainingFAQ
Quantitative Risk Assessment, Your Questions Answered
What is the full form of QRA?
QRA stands for Quantitative Risk Assessment. It is a numerical method that combines the consequence and the frequency of hazardous scenarios into a measured picture of risk to people, usually shown as individual risk contours and a societal risk F-N curve.
What is a QRA study?
A QRA study models the consequences of credible release scenarios, estimates how often each could occur, and sums them into individual and societal risk figures. It answers not just whether a hazard is serious, but how serious, how likely, and whether the risk is tolerable.
When is a QRA required in India?
A QRA is expected when a site holds hazardous material above threshold quantities, when PNGRB rules apply to a pipeline or terminal, when an IFC or lender condition requires numerical risk demonstration, when a facility is sited near people, or when an insurer requires documented evidence of individual and societal risk.
What is the difference between individual and societal risk?
Individual risk is the risk to a single person at a given location, shown as contours across the site. Societal risk is the risk to groups of people, shown as an F-N curve of frequency against the number affected. Siting and land-use decisions usually turn on societal risk.
What is the difference between a QRA and a HAZOP?
A HAZOP is a qualitative study that identifies hazardous deviations. A QRA is a quantitative study that puts numbers on the scenarios a HAZOP or PHA has found. The two are complementary: the qualitative work defines the scenarios, and the QRA measures their risk.
What tools do you use for consequence modelling?
We use recognised consequence modelling packages such as PHAST, EFFECTS and FLACS, chosen to suit the release type and the level of detail the study needs, and we build the models ourselves so the results are traceable.
Does Consultivo provide independent QRA studies?
Yes. Consultivo is an IFC-approved, genuinely independent consultant. We sell no equipment, software or instrumentation, so our QRA study carries no commercial bias, which is exactly what lenders, insurers and regulators look for.
- Get Started
Talk to a QRA Consultant
Tell us about your facility, your inventories and what you need to demonstrate. We will come back within one working day with a clear QRA study scope.
- IFC-approved, genuinely independent consultants
- Consequence modelling built in-house, not outsourced
- Risk contours, F-N curves and a clear tolerability verdict
- Remote, on-site or blended delivery
Let's discuss
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