Safety Critical Element Management Manual EP Restricted Work Preparation, Scheduling and Execution Process Guide (EP 2006-5445). • Corrective Maintenance Prioritisation Tool (CMPT). • Manual of Permitted Operations (MOPO) (EP 2005-0300-SP-04). 3. Execute performance assurance activities The SCE performance assurance tasks are carried out in the field, the results are recorded and assessed for conformance with the performance standard acceptance criteria and any follow on corrective work is identified. This section describes the performance assurance steps that are in addition to the normal maintenance work preparation, scheduling and execution activities, which are detailed in the Work Preparation, Scheduling and Execution Process Guide (EP The end result of the activities in this section is the identification of SCEs meeting their performance standards acceptance criteria follow on corrective work for SCEs which do not meet their performance standards acceptance criteria, which includes agreed priority and Latest Allowed Finish Date (LAFD) • SCE performance assurance task backlog deviations needed.