RISK SCORE AND RATING FACTOR CLASSIFICATION Value Consequence: C Extreme Risk a. Catastrophe; numerous fatalities; major disruption of activities 100 This activity / process must not be >500 b. Disaster; multiple fatalities 50 CONSEQUENCES implemented. An alternative must Most probable result of c. Very serious; fatality 25 be found. the potential accident. d. Serious; permanent disability 15 e. Moderate; serious but non-permanent disability 5 High Risk f. Minor; minor cuts, bruises, burns (first aid treatment required) 1 This activity / process must not be 300 499 – Exposure: E implemented without management approval. a. Continuously (or many times daily) 10 b. Frequently (approximately once daily) 6 EXPOSURE Substantial Risk The frequency of c. Occasionally (from once per week to once per month) 3 Unless there is no alternative this 100 299 – exposure to the hazard. d. Infrequent (from once per to once per year) 2 activity should not be implemented. Requires management approval. e. Rarely (once every 2 - 4 years) 1 f. Very rarely (once 5 years or more) 0.5 Medium Risk Probability: P Hazard must be examined against 50 - 99 current standards to determine a. Almost certain or expected result 10 PROBABILITY whether adequately controlled. b. Quite possible / not unusual 6 Requires management oversight. Likelihood that the consequence will occur c. Would be an unusual sequence or coincidence 3 once the individual is Low Risk d. Would be a remotely possible coincidence 1 10 - 49 exposed to the hazard. Manage by routine procedures. e. Has never happened after many years of exposure, but is conceivable 0.5 Caution must be observed. f. Practically impossible sequence (has never happened) 0.1 RISK SCORE CONSEQUENCE (C) X EXPOSURE (E) X PROBABILITY (P) = RISK CALCULATIONS:
FACTOR CLASSIFICATION Value RISK SCORE AND RATING CONSEQUENCES Most probable result of the potential accident. Consequence: C >500 Extreme Risk This activity / process must not be implemented. An alternative must be found. a. Catastrophe; numerous fatalities; major disruption of activities 100 b. Disaster; multiple fatalities 50 c. Very serious; fatality 25 d. Serious; permanent disability 15 e. Moderate; serious but non-permanent disability 5 300 – 499 High Risk This activity / process must not be implemented without management approval. f. Minor; minor cuts, bruises, burns (first aid treatment required) 1 EXPOSURE The frequency of exposure to the hazard. Exposure: E a. Continuously (or many times daily) 10 b. Frequently (approximately once daily) 6 100 – 299 Substantial Risk Unless there is no alternative this activity should not be implemented. Requires management approval. c. Occasionally (from once per week to once per month) 3 d. Infrequent (from once per to once per year) 2 e. Rarely (once every 2 - 4 years) 1 f. Very rarely (once 5 years or more) 0.5 50 - 99 Medium Risk Hazard must be examined against current standards to determine whether adequately controlled. Requires management oversight. PROBABILITY Likelihood that the consequence will occur once the individual is exposed to the hazard. Probability: P a. Almost certain or expected result 10 b. Quite possible / not unusual 6 c. Would be an unusual sequence or coincidence 3 10 - 49 Low Risk Manage by routine procedures. Caution must be observed. d. Would be a remotely possible coincidence 1 e. Has never happened after many years of exposure, but is conceivable 0.5 f. Practically impossible sequence (has never happened) 0.1 RISK SCORE CALCULATIONS: CONSEQUENCE (C) X EXPOSURE (E) X PROBABILITY (P) = RISK
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