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OSH : Hazards, risks, outcomes



The terminology used in OSH varies between states, but generally speaking:


 


    * A hazard is something that can cause harm if not controlled.


    * A risk is the probability of the hazard causing harm.


    * The outcome is the harm that results from an uncontrolled hazard.


 


“Hazardâ€, “riskâ€, and “outcome†are used in other fields to describe e.g. environmental damage, or damage to equipment. However, in the context of OSH, “harm†generally describes the direct or indirect degradation, temporary or permanent, of the physical, mental, or social well-being of workers. For example, repetitively carrying out manual handling of heavy objects is a hazard (it can cause harm). The risk can either be expressed mathematically, (0.5 = a 50/50 chance) or just as "high/medium/low". The outcome would be a musculoskeletal disorders (MSDs).


Risk assessment

Modern occupational safety and health legislation usually demands that a risk assessment be carried out prior to making an intervention. This assessment should:


 


    * Identify the hazards


    * Identify all affected by the hazard and how


    * Evaluate the risk


    * Identify and prioritise the required actions


 


The calculation of risk is based on the likelihood or probability of the harm being realised and the severity of the consequences. This can be expressed mathematically as a quantitative assessment (by assigning low, medium and high likelihood and severity with integers and multiplying them to give a risk factor), or as a description of the circumstances by which the harm could arise i.e. qualitative.


 


The assessment should be recorded and reviewed periodically and whenever there is a significant change to work practices. The assessment should include practical recommendations to control the risk.

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