The following diagram shows how the families used to create an Instrumented Function are related to one another.
Note: In the diagram, boxes represent entity families and arrows represent relationship families that are configured in the baseline database. You can determine the direction of the each relationship definition from the direction of the arrow head: the box from which the arrow originates is the predecessor, and the box to which the arrow head points is the successor.
Instrumented Function records are linked directly to records in the following families:
Inspection Task) : Stores details on when a proof test should be performed on the Equipment that is linked to the Inspection Task, including the due date for the task.
SIS Proof Test) : Stores details about a test that is performed on a logic solver or an instrumented function, and serves as a record of the event.
SIS Proof Test Template) : Stores details about the steps that should be taken when testing an instrumented function. When you create an SIS Proof Test, you must select an SIS Proof Test Template, and the details from the SIS Proof Test Template will be populated in the SIS Proof Test.
SIS Proof Test Task) : Stores details of proof test tasks that are scheduled for logic solvers or instrumented functions. SIS Proof Test Tasks can be linked to SIS Proof Tests.
Risk Assessment) : Stores the unmitigated risk associated with the item represented by the record to which the Risk Assessment record is linked.
Protective Instrument Loop) : Stores the details of the protective instrument loop and its components, including the calculated results of the proof test associated with the Logic Solver that is linked to the Protective Instrument Loop.
LOPA Assessment): Stores the details of the Layer of Protection Analysis (LOPA) that conducted, including a description of the initiating event that is indicative of a process failure. The LOPA stores details of the risk assessment that is determined after conducting the Layer of Protection Analysis. The LOPA Assessment is linked to a LOPA record and the LOPA records are linked to Risk Assessment record.
PHA Internal Assessment) : Stores the details of the Process Hazards Analysis (PHA) assessment that you want to conduct, including the target Safety Integrity Level (SIL), Required Probability of Failure, Risk Reduction Factor, and the SIL Mode. These values are calculated based on the overall risk rank of the selected Hazards Analysis Consequence.
Risk Matrix Internal Assessment) : Stores the details of the risk matrix assessment that you want to conduct, including the target Safety Integrity Level (SIL), Required Probability of Failure, Risk Reduction Factor, and the SIL Mode. These values are calculated based on the risk rank that you specify using the risk matrix.
External Assessment) : Stores the details of the external assessment that you want to conduct, including the target SIL, Required Probability of Failure, Risk Reduction Factor, and the SIL Mode.
SIF Common Cause Failure) : Stores the details of a failure that affects the operation of multiple instrumented functions.
Instrumented Function : Indicates that if both the instrumented functions represented by the two records are in their safe states at the same time, a hazardous event may occur.
