Incident Reporting Risk Matrix : Safety : The University of Melbourne

Incident Reporting Risk Matrix

On this page:

Help with risk ratings in Themis
Consequence Definitions
Likelihood Definitions
Risk Rating Calculation

Help with risk ratings in Themis

If you are a supervisor responding to an incident in Themis, on the Incident Investigation and Classification page, you will be asked to enter the Consequence and Likelihood 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.

More help and related information

More background about risk ratings and risk management: Risk Management
More help with Themis: see I need to respond to an incident (supervisors), or browse all help at Incident Reporting home page.
Talk to someone for advice

top of page

Consequence Definitions

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

Severity Level	Consequences Types
Severity Level	Health and safety	Natural Environment
V Catastrophe	Multiple fatalities, or significant irreversible effects to >50 persons	Very serious, long-term environment impairment of ecosystem functions.
IV Major	Single fatality and/or severe irreversible disability (>30%) to one or more persons
III Moderate	Moderate irreversible disability or impairment (<30%) to one or more persons	Serious medium term environment effects
II Significant	Objective but reversible disability requiring hospitalization	Moderate, short-term effects but not affecting ecosystem functions
I Negligible	No medical treatment required	Minor effects on biological of physical Environment

top of page

Likelihood Definitions

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

Likelihood (Probability)
Level	Descriptor	Description	Indicative Frequency (expected to occur)
A	Almost certain	The event will occur on an annual basis	Once a year or more frequently
B	Likely	The event has occurred several times or more in your career	Once every three years
C	Possible	The event might occur once in your career	Once every ten years
D	Unlikely	The event does occur somewhere from time to time	Once every thirty years
E	Rare	Heard of something like the event occurring else-where	Once every 100 years

top of page

Risk Rating Calculation

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

Likelihood Label	Consequences Label
Likelihood Label	I	II	III	IV	V
A	Medium	High	High	Very high	Very high
B	Medium	Medium	High	High	Very high
C	Low	Medium	High	High	High
D	Low	Low	Medium	Medium	High
E	Low	Low	Medium	Medium	High

Safety

Safety Menu