Seven Questions: The Essence of Hazops
- Type: Conference Presentation
- Conference Type: AIChE Spring Meeting and Global Congress on Process Safety
- Presentation Date: August 20, 2020
- Duration: 20 minutes
- Skill Level: Intermediate
- PDHs: 0.40
The PSM Standard, 29 CFR 1910.119, stipulates six methods as potentially appropriate for PHAs. Some are more appropriate than other in certain circumstances; some are rarely, if ever, appropriate. The method that is most commonly used and is often the most appropriate method is the Hazard and Operability Review, the HazOp.
There are almost as many âbestâ ways to do HazOps as there are facilitators leading them. What they all have in common, however, is that they use worksheets that are set up as tables that look at deviations in a node. For each deviation, a HazOp team considers âCausesâ, âConsequencesâ, âSafeguardsâ, âSeverityâ, âLikelihoodâ, and âRecommendationsâ, the headings of the table in a HazOp worksheet.
One of the jobs of a HazOp facilitator is to explain to team members that are new to HazOps what each heading means. Another job is to explain to experienced team members what each heading means, just in case theyâve picked up some bad habits.
Over the years, a set of questions has developed that are usually very helpful in helping team members understand their role in the HazOp, which is answering these seven questions.
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