Conduct of PHA

‘Process Hazard Analysis (PHA) (or Process Hazard Evaluation) is a set of organized and systematic assessments of the potential hazards associated with an industrial process. A PHA provides information intended to assist managers and employees in making decisions for improving safety and reducing the risks associated with the hazards, i.e. consequences of unwanted or unplanned releases of hazardous chemicals. Conduct of PHA refers to the different ways in which PHA can be performed. These include techniques such as HAZOP 9Hazard and Operability Study), What-If, MHA (Maintenance Hazard Analysis), FMEA (Failure Modes and Effects Analysis), Fault Tree Analysis.’

Reference: Adapted from Arthur, D. (1997). Layer of Protection Analysis: A New PHA Tool after HAZOP, Before Fault Tree Analysis. In International Conference and Workshop on Risk Analysis in Process Safety.

‘Process hazard analysis (PHA) is a specialized field of work and study that entails using structured techniques to analyze industrial processes in order to identify possible hazards and the risks associated with them’

Reference: Adaped from Frank, W. (2015). Process Hazard Analysis Fundamentals.

‘A PHA is defined as a systematic effort designed to identify and analyze hazards associated with a process  and a method to provide information which will help workers and employers in making decisions that will improve safety.’

Reference: Adapted from OSHA. (1992). OSHA Process Safety Management Standard.