Related Topics:
	Failure Modes and Reliability Analysis (FMRA) FMEA Hierarchy View System Panel and Analysis Panel

System Hierarchy

RBI's flexible system hierarchy interface allows you to manage large, multi-level system configurations with as many levels as you need and any number of items per level. You can fully define the properties for each item (e.g., supplier, part number, expected operating environment, etc.) and perform relevant analyses at any level within the system configuration.

For RCM and FMEA analyses, the hierarchy will consist of systems, subsystems and components, as shown in the following simple example. You can perform a variety of different analyses at any level in the configuration, and the icons indicate which analyses will be available in the Analysis panel when the item is selected.

For RBI analyses, you have the option to define systems and subsystems, if desired. However, the risk based inspection analysis can be performed only for specialized items that represent specific equipment and component types that are addressed in the API RP 580/1 guidelines. (See Building the RBI System Hierarchy.) For example, in the hierarchy shown next, System 1 consists of two types of equipment: Heat Exchanger and Pipe. The RBI analysis can be performed for the two components: HEXTUBE and PIPE-1.

Available Columns

The columns in the system hierarchy can display different information about each item. To choose which columns will be displayed at any given time on your computer, right-click inside any of the column headers, then click Customize Columns. These settings are stored per computer/username on the System Hierarchy page of the Application Setup, so any project that you open on this computer will have the same columns displayed.

The following columns are available:

• # displays the record position number assigned by RBI based on the position of the item in the system hierarchy. For example, if you insert a new item above an existing item, then the new item will take the number of the existing item and all items below it will be renumbered. Likewise, if you delete an item, all items below it will be renumbered automatically.

Tip: If these numbers fall out of sequence, choose System Hierarchy > Tools > Renumber All Items to update them.

• Name displays the item name. This is a required field, and it is specified on the Properties tab of the Analysis panel.

• Component Type is relevant only for Component items in a risk based inspection analysis. It indicates the type of component (which determines the analysis method that will be used).

• Area Risk (Plan Date) and Financial Risk (Plan Date) are relevant only for Component items in a risk based inspection analysis. They indicate the risk priority that has been calculated from the RBI analysis. As discussed in more detail in RBI Results, the "Plan Date" is the next date when the component is scheduled to undergo major maintenance or replacement. The "Area Risk" represents the risk to the surrounding area assuming that you do not schedule any inspections prior to the plan date, while the "Financial Risk" represents the financial consequences.

• Record ID displays a unique identifier assigned by RBI. The record ID is unique among all system hierarchy items that are defined in the database. It can also be used in the Query Utility to help identify a specific item that may share the same name with another item.

• User Access displays an icon when the item is inaccessible (see Status Indicators).

• •   Restricted Access. An item that is restricted to selected users and will not be available for editing until you are granted the appropriate item permissions.

  •   In Use. An item that is in use will not be available for editing until the other user closes the item or selects a different item. You can display the username of the account that is editing the item by moving the pointer over the icon whenever you see it.

• XFRACAS Associated Hierarchy Item is available for Enterprise databases only. It indicates that the item is associated with an XFRACAS hierarchy item. If an association exists, future changes made to the item and/or its failures and causes in XFRACAS can be brought into RBI by synchronizing the data.

• Reference Number displays the reference number associated with the item. To display this column in the current project, the field must be enabled on the Item > Properties page of the interface style. The number is specified on the Properties tab of the Analysis panel.

• • If you wish to automatically generate reference numbers (e.g., 1.2.1) for all items based on their positions in the hierarchy, choose System Hierarchy > Tools > Renumber All Items and then select the Apply to reference number field check box. This cannot be undone.

• Part Number displays the part number associated with the item. To display this column in the current project, the field must be enabled on the Item > Properties page of the interface style. The number is specified on the Properties tab of the Analysis panel.

• FMEA Document Number displays the document number for the FMEA associated with the item, if any. To display this column in the current project, the field must be enabled on the FMEA > Header page of the interface style. This number is specified on the Header tab of the FMEA, if there’s an FMEA defined for the item.

• Attachment displays a paper clip icon if one or more files have been attached to the corresponding item.

• Flag displays a flag for the item, if desired. The available flags are: Complete (indicated by a green flag), In Progress (indicated by a yellow flag) and Incomplete (indicated by a red flag). This flag is displayed in the interface only and does not affect reports.

• DFR Planner displays if a DFR Planner has been created for the item.

• Risk Discovery displays an icon if a risk discovery analysis has been performed on the item. If the analysis indicates that the item requires more detailed investigation, the icon will be red ; otherwise, the icon will be green .

• Risk Discovery Details displays a number if a risk discovery analysis has been performed on the item.

• • If the analysis uses risk discovery questions, then this cell will display the number of questions with "Yes" answers. More "Yes" answers indicates greater risk.

  • If the analysis uses risk discovery ratings, then this cell will display the sum of all the rating numbers selected in the analysis. Higher sums indicate greater risk.

• Process Flow Diagram Worksheet displays if a PFD worksheet has been created for the item.

• FMEA displays if an FMEA has been created for the item.

• •   Change Log Active. This indicates that an FMEA change log is present and that a revision is in progress.

  •   Locked FMEA. This indicates that an FMEA change log is present and that no revision is active.

• DRBFM displays if a design review based on failure mode (DRBFM) analysis has been created for the item.

• DVP&R displays if a design verification plan and report (DVP&R) analysis has been created for the item.

• •   Change Log Active. This indicates that an DVP&R change log is present and that a revision is in progress.

  •   Locked DVP&R. This indicates that an DVP&R change log is present and that no revision is active.

• Control Plan displays if a control plan has been created for the item.

• Process Flow Diagram displays if a graphical process flow diagram has been created for the item.

• FMEA Block Diagram displays if an FMEA Block diagram has been created for the item.

• Cause and Effect Diagram displays if a cause and effect diagram has been created for the item.