More on Hazop…..

For Hazop to be effective and interesting it is necessary to deconstruct the P&I D’s carefully into the right number of NODES. Nodes have to be meaningfully and logically selected. Making the node too big in order to save time will be counterproductive as analysis will be frustrating. Too many nodes will end up trivializing the Hazop. It is useful to have one parameter, say flow, or temperature, or pressure unchanged in the Node.

Hazop software takes out the drudgery from recording the observations in long hand and nothing more. The constant ‘cut and paste’ may take out the drudgery but also dulls the mind. There is a danger of repetitive and monotonous thinking.