ALARP Within RiskView

Nelson Kho

“Reasonably practical” is defined in the Work Health and Safety Act 2011 (s)18 as the following:

“In this Act, reasonably practicable, in relation to a duty to ensure health and safety, means that which is, or was at a particular time, reasonably able to be done in relation to ensuring health and safety, taking into account and weighing up all relevant matters including:

  • The likelihood of the hazard or the risk concerned occurring
  • The degree of harm that might result from the hazard or the risk
  • What the person concerned knows, or ought reasonably to know, about:
  • The hazard or the risk
  • Ways of eliminating or minimising the risk
  • The availability and suitability of ways to eliminate or minimise the risk
  • After assessing the extent of the risk and the available ways of eliminating or minimising the risk, the cost associated with available ways of eliminating or minimising the risk, including whether the cost is grossly disproportionate to the risk.”

The As Low As Reasonably Practicable(ALARP) Risk Assessment Principle enables the triage of risks into a ‘pecking order’ based upon the priority of action required. It is normally being grouped into 3 regions, being Generally Intolerable Risks, Tolerable Risks and Broadly Acceptable Risks.


The inevitability of the notion of risk occurring is that risks are always present and it is therefore practicably impossible to eliminate all risks. It is therefore accepted practice that risks may be tolerated providing that the risks are known and managed. For a risk to be acceptable it is required that it falls within the Broadly Acceptable Region of the ALARP Principle.

The steps to apply the ALARP principle are:

  • Identify and assess the nature of the risk
  • Review and evaluate existing controls
  • Consider options for further risk reduction
  • Decide which controls options will be adopted
  • Implement controls
  • Develop ALARP argument
  • Monitor/review residual risk

Most of the steps mentioned above are done during workshop and ALARP is then assessed after residual risk has been identified. Prior to this update, users do not have the ability to customise the ALARP categories based on their company’s policy, or other various reasons. With the reworked of the Target Risk Response (previously known as Tolerability Assessment), user can now customise the ALARP categories and how the ALARP principle will be calculated.

For example, if my company wants to group the risk into 4 ALARP categories instead of the generic 3 (as shown in the screenshot above), we can do that within RiskView. To do that, navigate to the Configuration Editor – Lookups – Target Risk Response Settings.

The options that are enabled by default are:

  • Acceptable
  • Tolerable
  • Manageable
  • Unacceptable

Now, how do all these options work within RiskView? First, you will need to map the Target Risk Response score with your risk matrix’s score. The floor algorithm will be utilised in here when mapping the computed risk (frequency * severity score) with the Target Risk Response score.

Using the configuration shown in the screenshot below, if the risk (the consequence final frequency value * severity score) for a consequence is calculated to be 900, it will be grouped to the “Manageable” Target Risk Response category.

Setting up the risk response

Now, how does Target Risk Response work if the bowtie is in simple mode (risk is not being computed for consequence)? Afraid not, the Target Risk Response will use the score defined in the risk matrix. For each cell within the risk matrix, you can define a score and the risk matrix scores are used in various places (such as quantifying which option is more severe, higher score = higher weighting, etc.). The score will then be mapped to the configured Target Risk Response options within your system.

For example shown in the screenshot below, the cell “15 High” has a score of 1000, it is then mapped to the Target Risk Response option of “Unacceptable”.

Risk matrix

Consequence details

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