More on HAZOP Guide Words, Process Parameters & Deviations
The development of meaningful deviations from the guide words depends on the nature of the process being studied.
2 approaches are possible:
1 Select a guide word – say, NONE – and apply it in turn to a number of process parameters – for example, FLOW, TEMPERATURE, PRESSURE – to produce such meaningful deviations as NO FLOW, NO PRESSURE and so on.
2 Select a process parameter – say, FLOW – and apply the guide words in turn to produce such meaningful deviations as NO FLOW, MORE FLOW and so on.