Family Field Descriptions | On-Premises APM

Active IPL Records

Active IPL records store information about the probability of failure of various types of active IPLs. This topic provides an alphabetical list and description of the fields that exist for the Active IPL family. The information in the table reflects the baseline state and behavior of these fields.

Important: The records in this family can be modified only by users who belong to the Security Groups MI SIS Administrator or MI HA Administrator.

This family is enabled for site filtering, which means that records in this family can be assigned to a specific site and will only be accessible to users who are assigned to the same site and have the appropriate license and family privileges. For more information, refer to the Sites section of the documentation.


Field	Data Type	Description	Behavior and Usage
Active IPL ID	Character	Identifies the type of Active IPL.	This field appears a list that is populated by the MI_ACTIVE_IPL System Code Table.
Default Value	Numeric	Indicates the default probability that the Active IPL will fail to mitigate the risk.	You can enter a value manually.
Lower Range	Numeric	Indicates the lower range for the probability that the Active IPL will fail to mitigate the risk.	You can enter a value manually.
Upper Range	Numeric	Indicates the upper range for the probability that the Active IPL will fail to mitigate the risk.	You can enter a value manually.

Asset Safety Preferences Records

Asset Safety Preferences records are used to store information about the criteria that a Safeguard must meet to be classified as an IPL. This topic provides an alphabetical list and description of the fields that exist for the Asset Safety Preferences family and appear on the Asset Safety Preferences datasheet. The information in the table reflects the baseline state and behavior of these fields. You can modify the records in this family only if you belong to the Security Group MI SIS Administrator or MI HA Administrator.

This family is not enabled for site filtering, which means that records in this family can be accessed by any user with the appropriate license and family privileges. For more information, refer to the Sites section of the documentation.


Field	Data Type	Description	Behavior and Usage
Preference Category	Character	Indicates the type of preference that you are defining.	This field is automatically populated with the following value: IPL. Important: You must not modify the value in this field.
Preference Name	Character	Indicates the name for the IPL criteria.	You can enter a value manually.
Preference Value	Character	Indicates the criteria that you want to configure for a Safeguard to be identified as an IPL.	You can enter a value manually. This field appears in the IPL Checklist section of the Safeguard datasheet.

Consequence Adjustment Probabilities Records

Consequence Adjustment Probability records are used to determine the probability that a conditional modifier event may occur, thereby adjusting the frequency of unmitigated consequence. This topic provides an alphabetical list and description of the fields that exist for the Consequence Adjustment Probability family and appear on the Conditional Modifier datasheet. The information in the table reflects the baseline state and behavior of these fields. These records in this family can be modified only by users who belong to the Security Groups MI SIS Administrator or MI HA Administrator.

This family is enabled for site filtering, which means that records in this family can be assigned to a specific site and will only be accessible to users who are assigned to the same site and have the appropriate license and family privileges. For more information, refer to the Sites section of the documentation.


Field	Data Type	Description	Behavior and Usage
Default Value	Numeric	Indicates the default value for probability of occurrence of the conditional modifier.	You can enter a value manually.
Modifier ID	Character	Identifies the type of conditional modifier.	This field appears a list that is populated by the MI_CONSQ_ADJ_PROB System Code Table.

Consequence Modifier Records

Consequence Modifier records store details about conditional modifiers (i.e., an event or action that can increase or decrease the probability that a risk may occur if not mitigated). This topic provides an alphabetical list and description of the fields that exist for the Consequence Modifier family and appear on the Conditional Modifier datasheet. The information in the table reflects the baseline state and behavior of these fields.

This family is enabled for site filtering, which means that records in this family can be assigned to a specific site and will only be accessible to users who are assigned to the same site and have the appropriate license and family privileges. For more information, refer to the Sites section of the documentation.


Field	Data Type	Description	Behavior and Usage
Conditional Modifier ID	Character	The identification for the conditional modifier.	The value entered in this field must be unique. This field is required.
Description	Character	The description of the conditional modifier.	You can enter a value manually.
Modifier Type	Character	The type of conditional modifier.	This field is required. This field is labeled Type on the Consequence Modifier datasheet. This field is populated with the value in the Modifier ID field of Consequence Adjustment Probabilities records.
Probability	Numeric	The probability that the conditional modifier can occur.	This field is disabled on the datasheet. Based on your selection in the Type field on the Consequence Modifier datasheet, this field is populated with the value in the Default Value field in the Consequence Adjustment Probability record. This value is multiplied by the value in the Enabling Event/Condition Probability field on the Layer of Protection Analysis (LOPA) datasheet to calculate the final probability for the initiating event.

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. 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 the Safeguards and IPLs workspace. The information in this table reflects the baseline state and behavior of these fields. This list is not comprehensive.

This family is enabled for site filtering, which means that records in this family can be assigned to a specific site and will only be accessible to users who are assigned to the same site and have the appropriate license and family privileges. For more information, refer to the Sites section of the documentation.


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 Safeguards and IPLs workspace.
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. This field is populated based on your selection in the IPL Type field of the Safeguard datasheet: If the value in the IPL Type field is Active IPL, this field is populated as defined in the Active IPL record. These values are retrieved using the Catalog query Public\Meridium\Modules\Hazards Analysis\Queries\Active IPL List. If the value in the IPL Type field is Passive IPL, this field is populated as defined in the Passive IPL record. These values are retrieved using the Catalog query Public\Meridium\Modules\Hazards Analysis\Queries\Passive IPL List. If the value in the IPL Type field is Human IPL, this field is populated as defined in the Human IPL record. These values are retrieved using the Catalog query Public\Meridium\Modules\Hazards Analysis\Queries\Active IPL List.
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 on the IPL Checklist section of the Safeguards and IPLs workspace.
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 Safeguards and IPLs workspace.
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.
LOOP ID	Character	Key of the Protective Instrument Loop selected in the Safeguard.	This field will load all the protective instrument loops present in the instrumented function of the safeguard.
Loop PFH	Numeric	Loop PFH from the PIL linked in the safeguard.	Loop PFH from the PIL linked in the safeguard. This field is disabled to update and you can update by selecting the refresh button () or when the loop is changed in the safeguard.
Loop PFD Avg	Numeric	Loop PFD Average from the PIL linked in the safeguard.	The Loop PFD Average from the PIL linked in the safeguard. This field is disabled to update and you can update by selecting the refresh button () or when the loop is changed in the safeguard.

Human IPL Records

Human IPL records store information about the probability of failure of various types of human IPLs. This topic provides an alphabetical list and description of the fields that exist for the Human IPL family. The information in the table reflects the baseline state and behavior of these fields.

Important: The records in this family can be modified only by users who belong to the Security Groups MI SIS Administrator or MI HA Administrator.

This family is enabled for site filtering, which means that records in this family can be assigned to a specific site and will only be accessible to users who are assigned to the same site and have the appropriate license and family privileges. For more information, refer to the Sites section of the documentation.


Field	Data Type	Description	Behavior and Usage
Default Value	Numeric	Indicates the default probability that the Human IPL will fail to mitigate the risk.	You can enter a value manually.
Human IPL ID	Character	Identifies the type of Human IPL.	This field appears a list that is populated by the MI_HUMAN_IPL System Code Table.
Lower Range	Numeric	Indicates the lower range for the probability that the Human IPL will fail to mitigate the risk.	You can enter a value manually.
Upper Range	Numeric	Indicates the upper range for the probability that the Human IPL will fail to mitigate the risk.	You can enter a value manually.

Initiating Event Records

Initiating Event records are used to determine the frequency of occurrence of an initiating event. This topic provides an alphabetical list and description of the fields that exist for the Initiating Event family and appear on the LOPA datasheet. The information in the table reflects the baseline state and behavior of these fields.

This family is not enabled for site filtering, which means that records in this family can be accessed by any user with the appropriate license and family privileges. For more information, refer to the Sites section of the documentation.


Field	Data Type	Description	Behavior and Usage
Default Value	Numeric	Indicates the default value for the frequency of the Initiating Event.	You can enter a value manually. This field populates the following fields: Frequency of Initiating Event field on the LOPA datasheet Cause Frequency (per year) field on the Hazards Analysis Cause datasheet.
Initiating Event ID	Character	Identifies the type of Initiating Event.	This field appears a list that is populated by the INIT_EVENT System Code Table.
Lower Boundary	Numeric	Indicates the lower boundary value for the frequency of the Initiating Event.	You can enter a value manually.
Upper Boundary	Numeric	Indicates the upper boundary value for the frequency of the Initiating Event.	You can enter a value manually.

IPL Checklist Records

IPL Checklist records store your selection for the criteria that are used to determine if a Safeguard is an IPL. The IPL Checklist family is linked to the Safeguard family using the Is Independent Protection Layer relationship family. This topic provides an alphabetical list and description of the fields that exist for the IPL Checklist family. The information in this table reflects the baseline state and behavior of these fields.

This family is enabled for site filtering, which means that records in this family can be assigned to a specific site and will only be accessible to users who are assigned to the same site and have the appropriate license and family privileges. For more information, refer to the Sites section of the documentation.


Field	Data Type	Description	Behavior and Usage
IPL Criteria	Character	Describes the criteria that can be used to determine if the safeguard can be considered an IPL.	This field contains a value from the list of criteria that you configured for IPL Checklist.
IPL Criteria Value	Boolean	Indicates if the criteria described in the IPL Criteria field is true for the safeguard.	By default, this field is cleared. If the field is selected, then the criteria is true for the safeguard.

LOPA Records

LOPA records store details about the LOPA that they represent. This topic provides an alphabetical list and description of the fields that exist for the LOPA family and appear on the LOPA datasheet, unless otherwise specified. The information in the table reflects the baseline state and behavior of these fields. This list is not comprehensive.

This family is enabled for site filtering, which means that records in this family can be assigned to a specific site and will only be accessible to users who are assigned to the same site and have the appropriate license and family privileges. For more information, refer to the Sites section of the documentation.


Field	Data Type	Description	Behavior and Usage
Analysis Type	Character	The type of the analysis that you are performing.	This field does not appear on the datasheet and is populated automatically with the value LOPA.
Calculated SIL	Numeric	The SIL value that is required to mitigate the risk that is associated with the Consequence to which this LOPA is linked.	This field is disabled and populated with the SIL value that is associated with the value in the Required PIF PFD field.
Comments	Text	Additional information about the LOPA.	You can enter a value manually.
Description	Text	A description for the LOPA.	You can enter a value manually.
Description of Initiating Event	Character	A description of the initiating event that is specified in the Initiating Event Type field.	You can enter a value manually.
Enabling Event/Condition Description	Character	A description of the enabling event, which is a condition that must occur simultaneously with an initiating event to allow the specific cause for a scenario to propagate to a consequence. (e.g., an explosive atmosphere acts as an enabling event that can increase the probability of the flammable gas being released).	This field does not appear on the datasheet.
Enabling Event/Condition Probability	Numeric	A number that represents the probability of occurrence of the enabling event. This value is used to determine the probability of an unmitigated event occurring.	You can enter a value manually. The value must be greater than 0 and less than or equal to 1. For example, if the equipment operates only for nine months a year, then provide a value of 0.75 in this field. This value is multiplied by the value in the Frequency of Initiating Event field to determine the value in Unmitigated Consequence Frequency field. If this field is empty, a default value of 1 will be used in that calculation.
Equipment ID	Character	A unique value that identifies the Equipment that you want to link to the LOPA.	You can select an Equipment to associate with the LOPA. After you select an Equipment, the Equipment Technical Number appears as a link in this field. You can select the link to access the datasheet for the Equipment. When you create a LOPA from a Hazards Analysis Consequence, this field is populated with the Equipment Technical Number of the Equipment that is linked to the corresponding Hazards Analysis Cause record.
Equipment Key	Numeric	The Entity Key of the Equipment that is linked to this Instrumented Function.	This field does not appear on the datasheet. When you link an Equipment to the LOPA, the details of the Equipment are retrieved based on the value in this field.
Frequency of Initiating Event	Numeric	A number representing the number of times per year that the initiating event specified in the Initiating Event Type field will occur.	This field is disabled. A baseline rule exists to populate this field with the default value of frequency specified in the Initiating Event record based on your selection in the Initiating Event Type field. This value is multiplied by the value in the Enabling Event/Condition Probability field to determine the value in Unmitigated Consequence Frequency field.
Functional Location ID	Character	A unique value that identifies the Functional Location that is linked to the LOPA.	You can select a Functional Location to associate with the LOPA. After you select a Functional Location, the Functional Location ID appears as a link in this field. You can select the link to access the datasheet for the Functional Location. When you create a LOPA from a Hazards Analysis Consequence, this field is populated with the Functional Location ID of the Functional Location that is linked to the corresponding Hazards Analysis Cause record.
Functional Location Key	Numeric	The Entity Key of the Functional Location that is linked to this LOPA.	This field does not appear on the datasheet. When you link a Functional Location to the LOPA, the details of the Functional Location are retrieved based on the value in this field.
Initiating Event Type	Character	A brief description of the event that could cause the risk that is described in the Unacceptable Consequence field to be mitigated.	This field with the values in the Initiating Event ID field in the Initiating Event records. If the Frequency of Initiating Event field does not contain a value, then a value is required in this field. When you create a LOPA from a cause-consequence pair in the Hazards Analysis module, this field is disabled and populated automatically with the value in the CCPS Cause Type field in the associated Consequence.
LOPA ID	Character	The ID for the Layer of Protection Analysis.	This field is required and must be unique among all the LOPA records linked to an instrumented function. You can enter your own value manually. The value in this field appears in the list of assessments for an instrumented function and is used to distinguish the LOPA from the others.
Mitigated Consequence Frequency	Numeric	Indicates the frequency of the mitigated consequence (i.e., the frequency of consequence after layers of protection have been added).	This field is disabled and populated automatically. The value is calculated by multiplying the value in the Unmitigated Consequence Frequency field by the value in the Total IPL PFD field.
Required Mitigated Consequence Frequency	Numeric	The maximum allowable frequency at which the initiating event can occur for the risk that is described in the Unacceptable Consequence field.	This field is required. This field appears in the LOPA Definition section of the LOPA datasheet as a list and contains the following hard-coded values: 1E-04 1E-05 1E-06 You can select a value from the list or enter your own value that is greater than 0 (zero). If you modify this value to be less than 0 (zero), a message will appear, and when you select OK, the modified value will revert to its original value. If you enter a value other than the baseline values in the list, it will then be added to the list.
Required PIF PFD	Numeric	A number representing the target probability that a failure will occur.	This field is disabled and populated automatically. This value is calculated automatically by dividing the value in the Required Mitigated Consequence Frequency field by the value in the Mitigated Consequence Frequency field. This value is used to determine the values in the Required PIF Risk Reduction Factor and Calculated SIL Level fields.
Required PIF Risk Reduction Factor	Numeric	A number representing the factor by which the risk should be reduced.	This field is disabled and populated automatically with the inverse of the value in the Required PIF PFD field.
Risk Category	Character	The category of the driving risk associated with the initiating event.	This field appears as a list that is populated with the values in the Category Name field in Risk Category records associated with the Risk Matrix for the site to which the LOPA belongs. Note: This field does not contain the Financial Risk Category associated with the Risk Matrix. If you change the value in this field, you must reselect a value in the Risk Severity field.
Risk Severity	Character	The level of severity of the driving risk associated with the initiating event.	This field appears as a list that is populated with the values in the Description field in Consequence records associated with the category that you selected in the Risk Category field.
Total IPL PFD	Numeric	The PFD value that is associated with all the IPLs in place for this consequence.	This field is disabled and populated in the Definition section of the LOPA datasheet. The value is calculated by multiplying the values in the PFD fields of each Independent Layer of Protection associated with the LOPA together.
Unacceptable Consequence	Character	A description of the risk for which you are conducting the Layer of Protection Analysis.	This field is populated with the value in the Consequence Description field in the associated Instrumented Function. You can modify this value if needed.
Unmitigated Consequence Frequency	Numeric	Indicates the frequency of unmitigated consequence (i.e., the frequency consequence before the layers of protection have been added).	This field is disabled and populated automatically. This value is calculated by multiplying the value in the Frequency of Initiating Event field by the value in the Enabling Event/Condition Probability field.

Safety Integrity Level Records

Safety Integrity Level records are used to determine the SIL value and contain the boundary values for the required probability of failures for different safety integrity levels. This topic provides an alphabetical list and description of the fields that exist for the Safety Integrity Level family. The information in the table reflects the baseline state and behavior of these fields. This list is not comprehensive.

This family is not enabled for site filtering, which means that records in this family can be accessed by any user with the appropriate license and family privileges. For more information, refer to the Sites section of the documentation.


Field	Data Type	Description	Behavior and Usage
Lower Bound	Numeric	The lower boundary value for the Safety Integrity Level.	You can enter a value manually.
Mode of Operation	Character	Indicates whether the record defines the SIL value for a safety system operating on low demand mode or on continuous mode.	You can enter a value manually.
Safety Integrity Level	Numeric	The SIL value for which the boundary values are defined in the record.	You can enter a value manually.
Upper Bound	Numeric	The upper boundary value for the Safety Integrity Level.	You can enter a value manually.

Passive IPL Records

Passive IPL records store information about the probability of failure of various types of passive IPLs. This topic provides an alphabetical list and description of the fields that exist for the Passive IPL family. The information in the table reflects the baseline state and behavior of these fields.

Important: The records in this family can be modified only by users who belong to the Security Groups MI SIS Administrator or MI HA Administrator.

This family is enabled for site filtering, which means that records in this family can be assigned to a specific site and will only be accessible to users who are assigned to the same site and have the appropriate license and family privileges. For more information, refer to the Sites section of the documentation.


Field	Data Type	Description	Behavior and Usage
Default Value	Numeric	Indicates the default probability that the Passive IPL will fail to mitigate the risk.	You can enter a value manually.
Lower Range	Numeric	Indicates the lower range for the probability that the Passive IPL will fail to mitigate the risk.	You can enter a value manually.
Passive IPL ID	Character	Identifies the type of Passive IPL.	This field appears a list that is populated by the MI_PASSIVE_IPL System Code Table.
Upper Range	Numeric	Indicates the upper range for the probability that the Passive IPL will fail to mitigate the risk.	You can enter a value manually.