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Alarp
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It means that a Risk is low enough that attempting to make it lower would actually be more costly than any cost likely to come from the risk itself. This is called a ''tolerable risk''. The ALARP principle arises from the fact that it would be possible to spend infinite time, effort and money attempting to reduce a risk to zero.


FACTORS


In this context, Risk is the combination of the frequency and the consequence of a specified hazardous event.

The following factors are likely to be considered when deciding whether or not a risk is ''tolerable''.
  • Health and safety guidelines

  • The specification of the system

  • Industry standards

  • International standards and laws

  • Suggestions from advisory bodies


Another factor that 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.


CARROT DIAGRAMS

So called Carrot Diagram s are often used to display risks. They are called carrot diagrams, because they have an elongated triangle in the centre, which looks like a carrot, and indicates the high (reducible) risks at the top and the low (insignificant) risks at the bottom. The region in between is called the ALARP region. An example of a carrot diagram can be found in {Link without Title} .


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