The ALARP (As Low as Reasonably Practicable) principle is based on the fundamental thinking of ‘acceptable’ or ‘tolerable’ risks. It allows analysts and decision makers to define boundaries to combine probability-consequence scales. These boundaries can be used to delineate acceptable and intolerable risks. This allows decision makers to evaluate whether a system or process poses certain risks which need to be treated using risk-control options. The ALARP principle can easily be combined with tools such as Risk Matrices to graphically represent the boundaries of risk tolerability.
Values for the probability of occurrence and the severity values using methods such as the risk matrix.
1. gather stakeholder views on the tolerability limits of risks
2. apply the ALARP limits
3. choose an appropriate diagram to capture the different probability and consequence values
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