Risk ranking | Type and urgency of control measures |
5―Very high/Unacceptable (93 < RL ≤ 100) | ・ The work cannot be started or continued until the risk is reduced. ・ If you cannot reduce the risk, the work should be prohibited. ・ If you can reduce the risk, always check the work starts and during the same if all control measures are implemented and operational. |
4―High/Unacceptable/Need strong controls to moderate (77 < RL ≤ 93) | ・ The work cannot be started until the risk is reduced. ・ If the risk is related to a work in progress, urgent action should be taken. Measures should be implemented due to the reduction of risk. ・ Always check at the outset that all control measures are implemented and operational. |
3―Medium/Moderate/Tolerable with controls (56 < RL ≤ 77) | ・ Measures should be implemented to reduce risk within a defined period of time, but the costs of implementation should be evaluated and limited. ・ If the moderate risk is associated with very serious injuries, one must establish more precisely the likelihood of damage and hence the possible need to improve prevention measures. ・ Check at appropriate intervals if all control measures are implemented and operational. |
2―Low/Tolerable/Acceptable with weak controls (22 < RL ≤ 56) | ・ The risk is reduced to the lowest level practicable. ・ Requires no additional measure unless one can consider solutions in which improved cost-benefit ratio is more favorable. ・ Check at appropriate extended intervals if all control measures are implemented and operational. |
1―Very low/Acceptable (0 < RL ≤ 22) | ・ Requires no additional measure other than to ensure that control measures are maintained. |