3 x 3 Risk Matrix

The matrix works by selecting the appropriate consequences from across the top, and then cross referencing against the row containing the likelihood, to read off the estimated risk rating. The following is a guide to the matrix's risk rating clarification.

Insignificant Risk

No action is required. Medium Risk. Efforts should be made to mitigate the risk. Risk should only be tolerated for the short term, and then only whilst further control measures to mitigate the risk are being planned and introduced, and these  within a pre-defined time period.  However, the costs of prevention should be carefully measured. Where the moderate risk is associated with extremely harmful consequences, further assessment maybe necessary to establish more precisely the likelihood of harm, this as a basis for determining the need for improved control measures. High Risk. Work activities should not be started until the risk has been mitigated. Significant resources may have to be allocated to mitigate the risk. Where the risk involves work in progress, urgent action should be taken.  Extreme Risk. Work should not be started or continued until the risk has been mitigated. If it is not possible to mitigate risk even with unlimited resources, the work should remain prohibited. TIRA - Task Inventory and Risk Assessments Windows based Risk Assessment Software Sample of a risk assessment input form used in the TIRA software TIRA takes the hard work out of risk assessing and simplifies the risk assessors workload.  TIRA helps the risk assessor complete the following occupational health and safety risk assessments: 1. Task Inventory (break the task down) 2. Task Based (general risk assessments) 3. Display Screen Equipment (DSE) 4. Manual Handling 5. Work Equipment 6. Workplace 7. Hazardous Substances 8. Fire Premises 9. First Aid 10. Personal Protective Equipment (PPE)