Find out your SSI Level
Does your site do a plan that includes all activities required for installation and commissioning?
Does your site installation and commissioning plan include a schedule for all activities and assign responsibility for each task?
Do your commissioning activities include confirming and documenting all field devices are operational and calibrated?
Do your commissioning activities include confirming logic solver and inputs/outputs are operational?
Do your commissioning activities include confirming that diagnostic alarms are promptly received by the maintenance workstation?
Do you have good documentation of all commissioning activities?
Does your SIS validation plan assign responsibility for each task?
Do your validation activities include confirmation that the SIS is properly protected against cyber-security attacks?
Do your validation activities confirm that all equipment is operating within environmental limits, as specified in the equipment safety manuals?
Do your validation activities include testing that sensors, logic solver, and final elements perform in accordance with the safety requirement specification, including all redundant channels?
Do your validation activities include a check of compatibility between process chemistry and materials of construction in process wetted devices?
Do your validation activities verify that the bypass functions, start up overrides, and manual shutdown systems operate correctly?
Do your validation activities include a check that accurate proof test procedures exist and include all necessary information including the proof-test intervals?
Do your validation activities verify that diagnostic alarms from SIS devices are properly annunciated to repair personnel?
Do you return all bypass functions and process isolation valves to their normal position and remove all force enables after the SIS validation and prior to the identification hazards being present?
Do your operation and maintenance procedures include all actions which need to be carried out to maintain the “as designed” functional safety of the SIS (for example, adhering to proof-test intervals defined by the SIL determination)?
Is SIS training done for maintenance personal and are these personnel evaluated for competency?
Do your operation and maintenance procedures include the information which needs to be maintained on device failures, proof test results, false trips, demand rates and restore times on the SIS?
Do your operation and maintenance procedures include procedures for fault diagnostics and repair after a failure in the SIS?
Do your operation and maintenance procedures require instruments to be rebuilt or replaced before the end of their useful life?
Do your operation and maintenance work tasks proceed only in accordance with the relevant procedures?
Do you perform periodic proof-tests using the written procedure?
Is your frequency of proof tests decided using the PFDavg calculation?
Are proof tests done on schedule?
Do you repair any deficiencies found during the proof testing in a safe and timely manner?
Do you replace failed equipment with only certified or safety qualified devices?
Do you maintain records of proof tests including "as found" results of the tests and inspections?
Do you have procedures for modifications to the SIS?
Do you maintain information for all changes to the SIS including a description of the change, reason for the change, and approvals required for each change?
Do you maintain information for all changes to the SIS including an analysis of the impact of the modification activity on the SIS?
Do you maintain information for all changes to the SIS including tests used to verify that the change was properly implemented and the SIS performs as required?
Do you maintain information for all changes to the SIS including tests used to verify that the change has not adversely impacted parts of the SIS which were modified?
Do you have procedures in place for decommissioning a SIS?
Do you execute an analysis of the impact on functional safety as a result of the decommissioned activity?