Review of the Process Hazard Analysis

After completion, the PrHA report should be reviewed internally. The review starts with an assessment of the team and its credentials. A technical review follows, focusing on the completeness of the analyses and the traceability and understandability of the documentation. 

OVERALL APPROACH TO THE PROCESS. Completeness of a PrHA depends on how methodical the PrHA team is in its approach. Reviewers should ask the following. 

Did the PrHA work its way through the process systematically, or did it jump around, overlooking important scenarios. Scenarios are harder to find if the PrHA does not move methodically from one part of the process to the next. 

Were all parts of the system considered All hardware and procedures should be considered, from the receipt of hazardous chemicals through their use in the process. In addition, if process connections exist, material flowing into sterns where it is not designed to be should also be considered. 

Were all stages and operating modes of the process considered Review should include analysis of procedures for material receipt and unloading, startup, shutdown (emergency and normal), and transitioning to partial operation (e.g., 

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