Figure 8: Performance assurance level in Asset hierarchy (functional

Safety Critical Element Management Manual
o firewater pump system o piping system or subsystem at item level:
o pressure vessel containing hydrocarbon o pipeline emergency valve o electrical motor operating in a potentially hazardous area o emergency generator.
Results are specified as either ayes no confirmation of an acceptance criteria being met or a specific quantitative measured value.
• Examples of yes/no confirmation:
o emergency escape lighting checks fora system/area o firewater pump functional check Examples of measure values:
o ESD valve closure time o relief valve lift pressure.
Performance assurance tasks maybe set at more detailed levels, i.e. lower levels in the Asset hierarchy. However, the benefit in the increased granularity of the performance assurance must be weighed against the additional work in recording the results. Appendix 3 has been created primarily for use on existing Assets whereas new Assets will generally define performance standards and record results at a more detailed level. It is also possible that planned maintenance routines developed by the RRM analyses required for reliability management purposes are more detailed than those for SCE
Management and would, therefore, also lead to a more detailed approach.
Where assurance tasks are being managed at a system level,
the SCE group of the system should be the same as the ‘child’
items for which the tasks are being set. Otherwise the results of the assurance tasks cannot be properly monitored/allocated to the correct SCE group and deviations potentially allocated to the incorrect reviewers.

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