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QRA involves the combination of accident consequences and probabilities into various risk measures including indices, individual risk, and societal risk. Results of the analyses are presented as point estimates, risk contours, or frequency-number (F-N) curves. Usually, the risk measures are compared with risk tolerance criteria such as limit lines. Risk sensitivities, importances and uncertainties are also evaluated so they can be considered in decision making.

QRA is used by companies in several ways including analyzing and ranking scenarios identified in process hazard analysis (PHA), providing quantitative data for use in decision making on risk, and comparing alternative process design options.

Why perform QRA?

Increasingly, companies recognize that reliance on purely qualitative risk analysis is insufficient where high consequence, low probability accidents are concerned. Qualitative risk estimates are subjective. Quantitative analysis provides a sounder basis for decision making regarding the tolerability of the risk of catastrophic accidents.

Why Primatech?

The performance of QRA requires highly skilled personnel and few companies employ such individuals. Often, outside experts are needed.

Primatech is experienced in conducting QRA and we have available the modeling tools and data needed to perform these analyses.

Services Offered

  • Quantification of the risks of hazard scenarios.

    We calculate scenario probabilities and consequences to determine scenario risk. We provide a report that documents the results of the calculations.

  • Quantification of process risk.

    We calculate overall risk measures for a process or facility. We provide a report that documents the results of the calculations.


All Services