What is a Process Hazard Analysis (PHA)?

A PHA is an OSHA directive that identifies safety problems and risks within a process, develops corrective actions to respond to safety issues, and preplans alternative emergency actions if safety systems fail. The PHA must be conducted by a diverse team that has specific expertise in the process being analyzed.

There are many consulting and engineering firms that also provide PHA services. PHA methodologies can include a What-If Analysis, Hazard and Operability Study (HAZOP), Failure Mode and Effects Analysis (FEMA), and a Fault Tree Analysis.