Hazards Analysis Safeguard Records

Hazards Analysis Safeguard records store details on safeguards that can be used to mitigate the risk. If the safeguard is an IPL, then these records also store the details of the IPL Type and the corresponding PFD value. The Hazards Analysis Safeguard family is also used in the Layers of Protection Analysis to store details about Safeguards. This topic provides an alphabetical list and description of the fields that exist for the Hazards Analysis Safeguard family. These fields appear on the Hazards Analysis Safeguard datasheet and in the IPL Checklist section of a Safeguard. The information in this table reflects the baseline state and behavior of these fields. This list is not comprehensive.

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Field	Data Type	Description	Behavior and Usage
Equipment ID	Character	The identification of the Equipment that is linked to the Safeguard through the Safety Analysis Has Equipment Relationship family.	You can select an Equipment to associate with the Safeguard. When you associate an Equipment with the Safeguard, the Functional Location to which the Equipment belongs is automatically associated with the Safeguard, and appears in the Functional Location ID box on the datasheet.
Equipment Key	Numeric	The Entity Key of the Equipment whose ID appears in the Equipment ID field.	This field does not appear on the datasheet by default.
Functional Location ID	Character	The identification of the Functional Location that is linked to the Safeguard through the Has Functional Location Relationship family.	You can select a Functional Location to associate with the Safeguard.
Functional Location Key	Numeric	The Entity Key for the Functional Location whose ID appears in the Functional Location ID field.	This field does not appear on the datasheet by default.
IF ID	Character	The ID of the Instrumented Function that is linked to the Safeguard.	You can select an Instrumented Function to associate with the Safeguard.
IF Key	Numeric	The Entity Key for the Instrumented Function whose ID appears in the IF ID field.	This field does not appear on the datasheet by default.
IPL Credits	Numeric	Indicates the order of magnitude by which the independent protection layer reduces the risk.	You can select a value from 1 through 10 from the drop-down list box. This field appears in the IPL Checklist section of the Safeguard.
IPL Reference Key	Numeric	The Entity Key for the Independent Layer of Protection that is linked to the Hazards Analysis Safeguard.	This field does not appear on the datasheet by default.
IPL Sub Type	Character	Indicates the classification of the independent layer of protection that you selected in the IPL Type field in the Safeguard records.	This field is disabled by default, indicating that the safeguard is not an independent layer of protection. If the safeguard is an independent layer of protection, then this field is enabled. Based on your selection in the IPL Type field of the Safeguard datasheet, this field contains a list of values defined in one of the following records: Active IPL record if the value in the IPL Type field is Active IPL. Passive IPL record if the value in the IPL Type field is Passive IPL. Human IPL record if the value in the IPL Type field is Human IPL.
PFD	Numeric	A number representing the probability that the independent layer of protection will fail to mitigate the risk.	By default, this field is disabled. Based on you selection in the IPL Sub Type field, this field is populated with the value in the Default Value field of one of the following record: Active IPL record if the value in the IPL Type field is Active IPL. Passive IPL record if the value in the IPL Type field is Passive IPL. Human IPL record if the value in the IPL Type field is Human IPL. This field appears in the IPL Checklist section of the Safeguard.
IPL Type	Character	Indicates the type of risk reduction that is provided by the independent layer of protection.	You can select one of the following values in this field: Consequence Reducing IPL Frequency Reducing IPL This field is labeled as Risk Reduction Type and appears on the IPL Checklist section of the Safeguard.
Safeguard Comment	Text	A comment about the safeguard.	You can enter a value manually.
Safeguard Description	Text	A detailed description of the safeguard.	You can enter a value manually.
Safeguard ID	Character	The identification of the safeguard.	You can enter a value manually. This field is required.
Safeguard Type	Character	The type of the safeguard.	This field contains the description of the System Codes that exist in the MI_HAZOP_SAFEGUARD_TYPE System Code Table. You can select a value from the following options: Process Design Process Control System PSV Operations Deluge System Fire Alarm Process Alarm SIS
Sequence Number	Numeric	A number that represents the position in which the Safeguard appears in the grid, relative to the other Safeguards that are linked to the same Consequence.	This field is used to populate the Safeguard Number field. This field does not appear on the datasheet by default.
Type	Character	If the safeguard is an independent layer of protection, this value indicates the type of risk the independent layer of protection mitigates.	By default, this field is disabled, indicating that the safeguard is not an independent layer of protection. If the safeguard is an independent layer of protection, then this field is enabled. This field contains the description of the System Codes that exist in the MI_IPL_TYPES_SAFEGUARD System Code Table. You can select a value from the following options: Active IPL Passive IPL Human IPL This field is labeled IPL Type in the IPL Checklist section of the Safeguard datasheet.