Equipment Risk Assessment
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RISK RATING MATRIX
LIKELIHOOD OF HAZARD OCCURRING
CONSEQUENCE IF HAZARD OCCURRED
CATEGORY
EXPLANATION
CATEGORY
EXPLANATION SAFETY & HEALTH
EXPLANATION
ENVIRONMENT
A. Almost Certain
It is expected to occur in most circumstances
Cat 1. Notable Event
Minor injury
– first aid injury
Very minor pollution
B. Very Likely
Has occurred in some circumstances (known to have occurred)
Cat 2. Significant Event
Single MTI
Minor local pollution
C. Likely (Possible)
Might have occurred at some time but details not known
Cat 3.1. Highly Significant
Single LWC or multiple MTI
Evident pollution local concern
D. Unlikely
Could occur but has not at yet happened
Cat 3.2. Serious Event
Permanent disability or multiple LWC
Significant local pollution
E. Very Unlikely
Has occurred somewhere (heard of it happening)
Cat 4.1. Extremely Serious
Single fatality
Major local pollution
F. Extremely Unlikely
Could theoretically occur but not aware of any instances
Cat 4.2. Catastrophic
Multiple fatalities
Extremely severe pollution
CONSEQUENCE
RISK LEVEL CLASSIFICATION
Cat 1
Cat 2
Cat 3.1
Cat 3.2
Cat 4.1
Cat 4.2
High
Unacceptable
Job must stop and not proceed without resolving this risk issue, for
example by adding more risk controls or substituting existing controls with
more effective ones.
L
IK
EL
IH
O
O
D
A
High
High
High
High
B
Medium
High
High
High
Tolerable
Job may proceed if further risk reduction is not practicable. Take action to
reduce risk where possible.
C
Medium
Medium
High
High
Medium
Acceptable
Job may proceed if further risk reduction is not practicable.
Review risk on subsequent jobs to determine whether further action is
appropriate.
D
Low
Low
Medium
Medium
High
E
Low
Low
Low
Low
Medium
Low
Negligible
Job may proceed. Further risk reduction should always be considered but
may not be practicable.
F
Low
Low
Low
Low
Low
Medium
