Final Stage of the PHA Process:
Hazard and
Operability Identification
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The Final Stage of the PHA (Process Hazard and Operability) Identification ensures that all potential hazards and operability issues are identified and addressed, providing recommendations to secure safe and efficient project operations.

- Final stage of the PHA process
- Performed during the detail design of the project or modification
- Designed to identify hazards and operability problems
Performed using one or more methods:
- “What-If”
- HAZOP – Hazard and Operability Study
- Failure Modes and Effects Analysis
- Procedural PHA
- EN 1050 Annex A Checklist (Risk Assessing Machines)
- Most common method is HAZOP / What If