Abstract
The technical application of the Hazard & Operability (HAZOP) technique has been advanced by some organisations and practitioners to a point well beyond the way the technique is described and exemplified in the most well-known textbooks on the subject. This is particularly the case with respect to the rigour with which it is being applied. This rigour is expressed in a number of best practices, referred to as golden rules which require a high level of detail in the recording of nodes and design intent, the development and analyses of scenarios and in the construction of recommendations. A number of tools have become available to assist HAZOP leaders in constructing scenarios through the rigorous identification of cases and development of deviations into scenarios. Technical challenges such as double jeopardy and common mode failure are better understood and HAZOP leaders are encouraged to develop consistent policies towards situations involving specific equipment.
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