The following diagram illustrates the families that participate in a Safety Integrity Level (SIL) analysis. The shaded boxes represent entity families, and the arrows represent relationship families. You can determine the direction of each relationship definition from the direction of the arrow-head: the box to the left of each arrow-head is the predecessor in that relationship definition, and the box to the right of each arrow-head is the successor in that relationship definition.
All SIL Analyses begin with an SIL Analysis record. Each SIL Analysis can be linked to:
One Equipment or Functional Location record.
One or more Human Resource records.
One or more Reference Document records.
One or more Instrumented Function records.
One or more Logic Solver records.
Each Logic Solver is linked to:
One or more Instrumented Function records.
One or more SIS Proof Test records.
One or more SIS Proof Test Template records.
Each Instrumented Function is linked to:
One Equipment or Functional Location record.
One or more Protective Instrument Loop records.
One or more Inspection Task records.
One Risk Assessment record.
One or more Layers of Protective Analysis (LOPA) records.
One Process Hazards Analysis (PHA) Assessment record.
One or more External Assessment records.
One or more SIS Proof Test records.
One or more SIS Proof Test Template records.
To simplify the data model images, the following families are not included:
Risk Assessment Recommendation: Within the SIS Management data model, the Risk Assessment Recommendation family participates as the successor in the Has Recommendations relationship definition with the following families:
Instrumented Function
Protective Instrument Loop
SIS Proof Test
SIS Proof Test Template
IPL Type: This family is not related to any family in the baseline Meridium Enterprise APM database. The IPL Type family is a subfamily of the Meridium Reference Tables family. IPL Type records store details about independent layer of protection types and are used to populate Independent Layer of Protection records.
Hazards Analysis: The Hazards Analysis family participates as the successor in the Has HAZOP Reference relationship definition with the SIL Analysis and Instrumented Function families.
