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Principles of Risk Assessment - Coggle Diagram
Principles of Risk Assessment
What is
Risk?
all the human activities
All decision making process
Never be avoided
Managed
Subjective
- not objective
Risk attitude
Types
Occupational/personal risk
Voluntary/ Involuntary
Pure/ Speculative
Bayers theorom
Probability of an event
based on
prior knowledge of conditions
Related to the event
Risk evaluation
on going process
Types
1. Unknown risk
Consequences not known / not fully understood
Nucleur power
Genetic engeneering
2. Concealed or unconscious risks
false sense of security
Ionizing radiation
Occupational disease
3. Conscious risk
Aware - detect by senses -mitigate
Burn by fire
Fall from tree
4. Predictable Risk
probability and the consequence
estimated -degree of
confidence/certainty
5. Temporary risks
Short time
Mostly acceptable
Some maintenance operation
Crossing a busy road.
How to
assess
Risk?
Risk Assessment
Qualitative
Assessment
expert judgement
Subjective - frequency & magnitude
Quantitative
Assessment
measures and
objective observation
statistics of the past
incident/accident history
Risk
= Hazard (Consequences) X Exposure (Likelihood)
HIRARC
Process
Classify work activities
Consultation
Employer
Representative
Worker
Representative
Identify Hazards
Risk Assessment
Prepare Risk Control Action Plan
Implement
Managing or Transferring?