1. Identify SCEs and performance standards 1.4 Define Operate phase performance standards The performance requirements developed during the first activity (see section 1.1) provides the starting point for refining them into Asset specific Operate phase performance standards. These shall include acceptance criteria that the SCEs must meet and shall be developed in detail to enable the practical verification that all hardware barriers are in place and effective. They are initiated during the Asset’s Define phase and finalised with specific performance requirements and performance assurance tasks during the Execute phase as part of the detailed design. These are the SCE performance standards to be used and maintained during the Asset’s Operate phase. The performance standards should not be confused with either the design specifications required to establish Technical Integrity or the preventive maintenance strategy required for the maintenance of equipment, e.g. lubrication. They specifically cover only the tasks necessary to validate that SCEs perform the function necessary for the barrier to be effective. Define performance assurance level When defining the Operate phase performance standards, it is important to consider how the performance assurance task will be carried out in practice during the Operate phase and to apply it at the appropriate level in the Asset hierarchy. Appendix 3 details the minimum level of granularity at which • the performance standards, performance assurance tasks and acceptance criteria shall beset, and • the results shall be recorded. The following are some examples which are also shown in Figure 8. Performance standards and acceptance criteria are set at anything from a system and/or area to an individual maintainable item. Examples are • at system level o fire detection system o emergency escape lighting system EP 2009-9009 Restricted 19 Figure 8: Performance assurance level in Asset hierarchy (functional
