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Risk assessment

The Technical report ISO/TR 14121-2 puts forward a practical guide for the examination of the hazards (EN ISO 12100 complied) with the aim of selecting and adopting the most suitable safety measures to reduce or eliminate the risks.
 
 
 
For USA an equivalent procedure is described in the ANSI Technical Report B11.TR3-2000.

The risk assessment can thus be broken down into 4 stages:

fig1

1. Determination of the limits of the machine
Consists in the examining of the intended use and of all the reasonably foreseeable misuses in relation to the level of training, experience and attitude of the user.

2. Identification of the hazards
Consists in the systematic identification of:
  •  The risks and the hazardous elements (mechanical, electrical, chemical, etc.)
  •  Hazardous situations (manual loading-unloading, access to the system, etc.)
  •  Events that might cause damages (machine failures or anomalies)

3. Risk estimation
Each hazardous situation identified is derived from a combination of the following elements:

  •  Severity of injuries or damage to health (reversible, irreversible, fatal)
  •  Probability of occurrence of that injury, which is a function of frequency and duration of exposure to danger
  •  Possibility of avoiding danger with reference to:
    • rapidity of occurrence of the event,
    • possibility by the operator to perceive hazards and react promptly,
    • possibility to escape.

4. Risk evaluation
It examines the suitability of the safety measures adopted.

 

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