Appendix 1: Process for Defining SIS Proof Testing ...
Appendix 1: Process for Defining SIS Proof Testing Requirements PFD CalculationCan FMbe revealed by direct Testing at PTIMAINTENANCE PHASENOTE 1YNIdentify failure modes (FMs) of all SIS componentsCan FMbe revealed by other methods at PTI?Redesign SISUpdate PFD calc to show effects of partial testingPFD requirements met?NOTE 2NOTE 3NOTE 4NOTE 7YNNNOTE 5For each FM of each SIS componentYPartial Testing Valid optionDESIGNPHASEPFD requirements met?All FMs revealed?Record direct, other or partial test methodNNYYNYNOTE 6NOTE 8SRSSIS designFailure dataRepair timesPlant availabilityProof Test IntervalsProof Test Procedures Figure 1: Process for the management of Proof Testing Requirements Notes to Figure 1 Note 1: The SIS design and PFD calculation might be as a result of a new (or modified) SIS or a r
Note 2: Refers to credible failure modes that would prevent the SIS operating in accordance with the SRS. See guidance below on ‘Identifying failure
Download Appendix 1: Process for Defining SIS Proof Testing ...
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