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Michael Moosemiller

published on

August 2020


This BakerRisk Best Practice document provides general guidance for performing highly effective HAZOP studies. Note that the guidance is not rigid; it is our opinion that there is no one ‘best’ way to perform a HAZOP, and the optimal methods will depend on what is being studied, the makeup of the study team, and many other factors. However, there are many ways to perform a HAZOP poorly, and we will discuss the history of HAZOP approaches and tools, and the pros and cons of the current methods that are in use in different circumstances to prevent poor performance.

Key aspects of a highly effective HAZOP study are presented below, in order of importance:
1. High-quality and up to date reference documents such as P&IDs
2. Knowledgeable and open-minded team members
3. Skilled HAZOP facilitator
4. Established and effective HAZOP protocols
5. Adequate time

The priorities listed above are in the eye of the beholder. A regulator, for example, might have a different view of what constitutes inputs to a ‘good’ HAZOP study. The order above reflects the primary, original intent for performing HAZOP studies which, in our view, is to identify measures that protect personnel, minimizes equipment damage, and improves operability.

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