What are the differences between Preliminary Hazard Analysis (PHA) and Job Safety Analysis (JSA)?
Preliminary Hazard Analysis
PHA provides list of all possible hazards which may exist in the system. It is a preliminary listing so it is broad rather than deep. It ensures that all the hazards are considered before focusing on a single Hazard. In PHA, hazards are listed in ranks according to their severity.
Job Safety Analysis
JSA helps in identifying, analyzing and documenting the steps performed while performing a specific job, identifying the hazards associated with job and ways to control the hazards identified. Hazard identification is done using tools like what if analysis and scenario analysis.
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