 However, it will also need to balance between "too large and complex" (fewer nodes, but the team members may not be able to consider issues within the whole node at once) and "too small and simple" (many trivial and repetitive nodes, each of which has to be reviewed independently and documented).For each node in turn the HAZOP team uses a list of standardised guide-words and process parameters to identify potential "Deviations" from the design intent.For each deviation, the team identifies feasible "Causes" and likely "Consequences" then decides (with confirmation by subsequent risk analysis where necessary) whether the existing safeguards are sufficient, or whether an "Action" to install an additional safeguard is necessary to reduce the risks to an acceptable level.