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That unmitigated risk is then compared against a tolerable risk target. The difference between the unmitigated risk and the tolerable risk, if the unmitigated risk is higher than tolerable, must be addressed through risk reduction of provided by the SIF. This amount of required risk reduction is correlated with the SIL target.
Risk is the lack of certainty about the outcome of making a particular choice. Statistically, the level of downside risk can be calculated as the product of the probability that harm occurs (e.g., that an accident happens) multiplied by the severity of that harm (i.e., the average amount of harm or more conservatively the maximum credible amount of harm).
As an EPC should never be considered beneficial to a task, it is calculated using the following formula: Calculated Effect = ((Max Effect – 1) × Proportion of Effect) + 1. 4. A final estimate of the HEP is then calculated, in determination of which the identified EPC's play a large part.
The risk rating of the hazard prior to applying the control is known as the 'inherent risk rating'. The risk rating of the hazard with the control in place is known as the 'residual' risk rating. Risk, within the occupational health and safety sphere, is defined as the 'effect of uncertainties on objectives [8] '. In the context of rating a ...
In this context, risk is the combination of the frequency (likelihood) and the consequence of a specified hazardous event. Several factors are likely to be considered when deciding whether or not a risk has been reduced as far as reasonably practicable: [3] [4] Health and safety guidelines and codes of practice
[48] [49] The Sendai Framework for Disaster Risk Reduction is a 2015 international accord that has set goals and targets for disaster risk reduction in response to natural disasters. [50] There are regular International Disaster and Risk Conferences in Davos to deal with integral risk management.
Equivalently, if the risk of an outcome is decreased by the exposure, the term absolute risk reduction (ARR) is used, and computed as . [2] [3] The inverse of the absolute risk reduction is the number needed to treat, and the inverse of the absolute risk increase is the number needed to harm. [2]
An example of residual risk is given by the use of automotive seat-belts. Installation and use of seat-belts reduces the overall severity and probability of injury in an automotive accident ; [ 2 ] however, probability of injury remains when in use, that is , a remainder of residual risk.