Incident reporting risk matrix

Likelihood and Consequences

If you are a supervisor responding to an incident in ERMS, you will be asked to enter the Likelihood and Consequence of the incident, in order to assign a Risk Rating. This page provides a quick reference for the meaning of each option you can choose.

Need more help or information, talk to someone for advice.

  • Consequence definitions

    Use the consequence table below to determine the severity of the incident.

    Consequences Types
    Serverity Level Description
    Severe

    Severe injury/illness requiring life support, actual or potential fatality, greater than 250 days off work

    Major

    Extensive injuries requiring medical treatment (e.g. surgery), serious or permanent injury/illness, greater than 10 days off work

    Moderate

    Multiple medical treatments, non-permanent injury, less than 10 days off work

    Minor

    Single occurrence of medical treatment, minor injury, no time off work

    Insignificant

    First aid treatment, minor injury, no time off work

  • Likelihood definitions

    Use the likelihood table below to assist in determining the likelihood of the incident occurring or re-occurring.

    Likelihood (Probability)
    Description Probability of occurance (expected to occur)
    Almost certain

    Will occur in most circumstances when the activity is undertaken

    >90%

    Likely

    Will probably occurin most circumstances when the activity is undertaken

    51-90%

    Possible

    Might occur when the activity is undertaken

    21-50%

    Unlikely

    ould happen at some time when the activity is undertaken

    1-20%

    Rare

    May happen only in exceptional circumstances when the activity is undertaken

    <1%

  • Risk rating calculation

    ERMS will automatically calculate the Risk Rating from the consequence and likelihood ratings, using the table below.

  • Risk rating priority for action

    Use the table below to assist in prioritising actions and associated time frames.

    Risk Rating Priority for Action
      Risk acceptance guideAction Recommended action time frame
    Extreme

    Not acceptable

    Cease or isolate source of risk

    Immediate

    Implement further risk controls Up to 1 month
    Monitor, review and document controls Ongoing
    High

    Generally (in most circumstances) not acceptable

    Implement risk controls if reasonably practicable

    1 to 3 months

    Monitor, review and document controls Ongoing
    Medium

    Generally (in most circumstances) acceptable

    Implement risk controls if reasonably practicable

    3 to 6 months

    Monitor review and document controls Ongoing
    Low

    Acceptable

    Monitor and review

    Ongoing