4.5.4 Assurance For each SCE, the process that ensures its continued suitability through assurance must be summarised. The assurance process must entail active testing of the full functionality of each active SCE on a time interval that ensures that the risk from failure is ALARP. The process by which this interval is defined must be summarised. The assurance processes should ensure that all potential failure modes of the SCE are tested. Similar processes must be described for each passive SCE and although testing is not usually required, the process by which the inspection of passive components (for example passive fire protection, hydrocarbon containment, especially to countenance ageing, is achieved will be demonstrated. 23 Often referred to as operational risk assessments.
