Preliminary Hazard Analysis Procedure
Preliminary hazard analysis is performed to identify
possible hazards that could be created by the system being designed.
This information can then be used to reduce the severity or build-in
safeguards against the effects of the identified hazards.
Common sources of hazards are:
- Sources and propagation paths of stored energy
in electrical, chemical, or mechanical form;
- Mechanical moving parts;
- Material or system incompatibilities;
- Nuclear and electromagnetic radiation (including
infra-red, ultra-violet, laser, radar, and radio frequencies);
- Collision and subsequent problems of survival
- Fire and explosion;
- Toxic and corrosive liquids and gases escaping
from containers or being generated as a result of other malfunctions
(for example, overheating);
- Deterioration in long-term storage;
- Noise including sub-sonic and supersonic vibrations;
- Biological hazards, including bacterial growth
in such places as fuel tanks;
- Human error in operating, handling, or moving
near equipment of the system;
- Software error where it can cause loss of life
or limb to humans, or cause major damage to property.
When a hazard is identified it can be categorized
and treated as accepted or as needing further investigation. When
safety is an issue the hazard will be tracked in an hazard log
and subjected to continual review.
When a hazard is accepted its effects shall be controlled
by a change in design.
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Copyright © by Ken Rigby 1996, 1997, 1998