ALARP , which stands for "as low as reasonably practicable"  , or ALARA ("as low as reasonably achievable"), is a term often used in the regulation and management of safety-critical and safety-involved systems. The ALARP principle is that the residual risk shall be reduced as far as reasonably practicable. In UK and NZ Health and Safety law, it is equivalent to SFAIRP ("so far as is reasonably practicable"). The following factors are likely to be considered when deciding whether or not a risk has been reduced as far as reasonably practical . Health and safety guidelines and codes of practice Manufacturer's specifications and recommendations Industry practice International standards and laws Suggestions from advisory bodies Comparison with similar hazardous events in other industries Cost of further measures would be disproportionate to the risk reduction they would achieve Another factor that often comes into the ALARP principle, is the cost of assessing the improvement gained in an attempted risk reduction. In extremely complex systems, this can be very high, and could be the limiting factor in practicability of risk reduction, although according to  HSE guidance, cost alone should never be a justification for taking extra safety risks.
ALARP ( "as low as reasonably practicable" ) , or ALARA ("as low as reasonably achievable"), is a principle in the regulation and management of safety-critical and safety-involved systems. The principle is that the residual risk shall be reduced as far as reasonably practicable. In UK and NZ Health and Safety law, it is equivalent to SFAIRP ("so far as is reasonably practicable"). Several factors are likely to be considered when deciding whether or not a risk has been reduced as far as reasonably practical : Health and safety guidelines and codes of practice Manufacturer's specifications and recommendations Industry practice International standards and laws Suggestions from advisory bodies Comparison with similar hazardous events in other industries Cost of further measures would be disproportionate to the risk reduction they would achieve Another factor is often the cost of assessing the improvement gained in an attempted risk reduction. In extremely complex systems, this can be very high, and could be the limiting factor in practicability of risk reduction, although according to UK HSE guidance, cost alone should never be a justification for taking extra safety risks.
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