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Risk: Difference between revisions
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Control of risk is a pervasive issue in engineered processes. All Engineer-it strategies contibute to minimisig the risk of unsatisfactory outcomes. | Control of risk is a pervasive issue in engineered processes. All Engineer-it strategies contibute to minimisig the risk of unsatisfactory outcomes. This is known as ''risk mitigation''. | ||
A common defininition of risk is: the combination of the likelihood of occurrence and the consequences of a hazard (i.e. a negative event i.e. a hazard. | A common defininition of risk is: the combination of the likelihood of occurrence and the consequences of a hazard (i.e. a negative event i.e. a hazard. | ||
A process for controlling risk is: | A process for controlling risk is: First, identify the hazard; then use mitigation measures in this order of preference: | ||
First, identify the hazard; then in order of preference: | |||
# Take action to eliminate it | # Take action to eliminate it | ||
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# Seek to reduce the consequences should the event occur. | # Seek to reduce the consequences should the event occur. | ||
For example, in construction site safety, the hazard of people falling from a scaffold may be mitigated by: | |||
# Eliminate: Avoid using a scaffold; work from secure platforms on the inside of the building. | |||
# Reduce likelihood: Provide a barrier on the outside of the scaffold. | |||
# Reduce consequences: personnel attached by a safety line.Formal approaches to risk control inclued | |||
''What-if analysis'' is commonly used to identify hazards. The risk analysis team ask questions such as 'What if the control system fails?' | |||
Formal approaches to risk control include: | |||
Use of a [[wikipedia:Risk_register|risk register]] where the hazards are identified, quantified and mitigated | |||
Hazard and operability analysis ([[wikipedia:Hazard_and_operability_study|HAZOP]]) - typically used for the design and operation of chemical plant. | |||
=== Safety-criticial systems === | |||
The failure of a safety-critical system could result in loss of life, significant financial loss, damage to the environment, etc. | |||
Safety-critical contexts arise in the development of drugs, in the flight control of aircraft, in construction of infastructure. | |||
Safety culture | ==== Safety culture ==== | ||
A safety culture is where all involved in the enterprise | |||