Failure mode

Unique number that APM assigns to the failure mode.

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Abbreviation

Abbreviated name of the damage mechanism.

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Damage mechanism

A damage mechanism is a general cause of problems or failures within process equipment. Examples of damage mechanisms are corrosion under insulation, brittle fracture, thermal fatigue, and heat damage.

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Hole size

Description of the hole size appropriate to this failure mode.

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Base probability

Initial probability of failure, typically the value before analysis.

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Failure Mode

A failure mode is an event that causes an asset to fail to perform its function. For example, if a pump’s impeller becomes worn, the pump cannot convey liquid at the required rate. When failure mode optimization requires Isograph Availability Workbench, this attribute is mapped to the cause description in AWB.

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Failure effect

A failure effect is the consequence of a failure mode. For example, when a pump’s impeller becomes worn (failure mode), the flow through the pump declines until it no longer delivers liquid at the required rate. When failure mode optimization requires Isograph Availability Workbench, this attribute is mapped to project effect description.

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Asset

Asset number assigned by APM to the asset.

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Title

The name or short description of this item. You can enter up to 250 characters.

Hierarchy location

A hierarchy location is a string of letters and numbers that identifies where the asset is in the physical hierarchy. APM constructs a full hierarchy location using the code that you enter in the Hierarchy code box joined with the hierarchy codes for its parent/ancestors. The codes are separated by a period (.). Hierarchy locations are updated whenever the asset or one of its ancestors is moved within the hierarchy (or if a hierarchy code changes).

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Consequence priority

The asset’s consequence priority number is typically the result of asset prioritization analysis, although it can be set manually. Consequence priorities are often used when sorting and analyzing the work backlog for scheduling or when analyzing asset failure information. APM also uses consequence priorities to determine whether or not to push indicator alarms up the physical hierarchy so that they will be visible on higher levels in the indicator monitoring panel. Warning: The ranking number assigned to consequence priorities is also used to calculate alarm notification rankings for indicator alarms. If you do not select a priority setting for an asset, alarm notifications might not be pushed up the hierarchy to be displayed on a parent asset. This can affect the display of the alarm in the site’s Inspection Management view.

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Type	Failure types and classifications allow failures to be grouped and categorized for reporting purposes. Select the type and classification that apply to the failure mode.

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Classification

Failure types and classifications allow failures to be grouped and categorized for reporting purposes. Select the type and classification that apply to the failure mode.

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Barriers supported on failure modes

When this option is not selected, barriers are not available on failure modes created from this library entry.

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Technology supported on failure modes

When this option is not selected, technologies are not available on failure modes created from this library entry.

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Technology

Technologies are the means used to examine or test equipment for signs of wear.

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Location

Location refers to the area of the asset where the deterioration is most likely to occur.

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Location note

Provide a detailed description of the location on the asset where deterioration is detected.

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Temperature range is supported on failure modes

When this option is selected, temperature ranges are available on failure modes created from this library entry.

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Temperature range

Range of temperatures in which the damage mechanism might occur.

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Load type is supported on failure modes

When this option is selected, types of loading are available on failure modes created from this library entry.

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Load type

Load type is an aspect of the operating environment in which the damage mechanism is prone to occur. Examples are static stress, cyclic stress, and impact.

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Process is supported on failure modes

When this option is selected, processes are available on failure modes created from this library entry.

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Process

Process is an aspect of the operating environment in which the damage mechanism is prone to occur. Examples are hydrogen, phosphoric acid, and carbon.

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Flow is supported on failure modes

When this option is selected, flow conditions are available on failure modes created from this library entry.

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Flow	Flow is an aspect of the operating environment in which the damage mechanism is prone to occur. Examples are motionless-static and hydrodynamic.

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Failure code

Your organization decides on the number and names for failure codes.

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Damage code

Damage codes provide predefined categories to describe asset damage. For example, ARLK for Air Leak. Damage code can be optional when you are adding an event to a request for work. However, if a damage code and activity code are not selected, the event will not have a work priority.

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Failure code

Your organization decides on the number and names for failure codes.

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Supports susceptibility to failure evaluation

This option is selected by default. Clear the option if failure modes that are based on this damage mechanism do not require susceptibility evaluation.

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Questionnaire

A susceptibility to failure questionnaire presents the analyst with a series of questions. Like a decision diagram, the response to one question determines the next question, and so on, until a conclusion is reached about the likelihood of failure.

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Probability of failure evaluations

The evaluation group assigned to this library failure mode. Probability evaluations will display questions from categories assigned to the group.

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Health and safety effects evaluations

The evaluation group assigned to this library failure mode. Health and safety evaluations will display questions from categories assigned to the group.

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Environmental effects evaluations

The evaluation group assigned to this library failure mode. Environmental evaluations will display questions from categories assigned to the group.

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Reputation effects evaluations

The evaluation group assigned to this library failure mode. Reputation evaluations will display questions from categories assigned to the group.

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Description

The description of the item. You can use this box to include any additional details.

Failure mode descriptions can be changed

When this option is selected, the analysis team can change the descriptions on failure modes.

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Degradation Pattern Supported on failure modes

When this option is not selected, degradation patterns are not available on failure modes created from this library entry.

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Degradation Mechanism supported on failure modes

When this option is not selected, degradation mechanisms are not available on failure modes created from this library entry.

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Degradation Category supported on failure modes

When this option is not selected, degradation categories are not available on failure modes created from this library entry.

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Degradation Scope supported on failure modes

When this option is not selected, degradation scopes are not available on failure modes created from this library entry.

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Degradation Type supported on failure modes

When this option is not selected, degradation types are not available on failure modes created from this library entry.

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Material Type supported on failure modes

When this option is not selected, material types are not available on failure modes created from this library entry.

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Theoretical Rate supported on failure modes

When this option is not selected, theoretical rate is not available on failure modes created from this library entry.

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Degradation Rates supported on failure modes

When this option is not selected, degradation rates are not available on failure modes created from this library entry.

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Degradation

When this option is not selected, the Degradation tab is hidden on failure modes created from this library entry.

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Degradation rates

When this option is not selected, the Degradation rates tab is hidden on failure modes created from this library entry.

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Failures

When this option is not selected, the Failures tab is hidden on failure modes created from this library entry.

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History

When this option is not selected, the History tab is hidden on failure modes created from this library entry.

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Symptoms

When this option is not selected, the Symptoms tab is hidden on failure modes created from this library entry.

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Usage group

Usage groups control the damage mechanisms library entries that are available to add to an RBI analysis. For example, if a usage group is specified in the analysis’ Failure Mode options, only entries assigned the same usage group are available for selection in the Browse Damage Mechanisms Library dialog.

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Asset types used with this failure mode library entry

The options are: • Failure modes are created for all asset types – When this library failure mode is added to an RBI analysis, a failure mode is created for every analysis asset, irrespective of asset type. • Failure modes are created for the context asset only – When this library failure mode is added to an RBI analysis, a failure mode is created for the primary asset. • Failure modes are only created for the types of assets selected below – When this library failure mode is added to an RBI analysis, a failure mode is created for all analysis assets of the selected types.

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