Reliability-with-Repair.PPT Reliability with Repair Last revised 12/06/2006

Reliability-with-Repair.PPT

Reliability with RepairLast revised 12/06/2006


ASENT RBD Analysis – Reliability with Repair

ASENT’s RBD Analysis tool supports a number of ASENT’s RBD Analysis tool supports a number of different model types. Elements can be modeled in different model types. Elements can be modeled in series, parallel, series-parallel combinations, and series, parallel, series-parallel combinations, and complex active or standby redundancies. ASENT complex active or standby redundancies. ASENT supports both Mission Reliability and Reliability with supports both Mission Reliability and Reliability with Repair.Repair.

This presentation will focus on a This presentation will focus on a Reliability with Reliability with Repair Repair example. For more details on RBD Analysis example. For more details on RBD Analysis click on the link below, and select Reliability Modeling click on the link below, and select Reliability Modeling to access a 20 page help file in PDF format.to access a 20 page help file in PDF format.

http://www.raytheoneagle.com/asent/tutorial/help.htm


ASENT RBD Analysis – Reliability with Repair

This tutorial assumes that you have already built a This tutorial assumes that you have already built a product tree structure for your project and that failure product tree structure for your project and that failure rates have been calculated and are current.rates have been calculated and are current.

If you need help with this please refer to the If you need help with this please refer to the Introduction tutorial.Introduction tutorial.


Step 1 – Select Type of Analysis

Two types of RBD Two types of RBD analysis are analysis are available: 1) available: 1) Mission Reliability, Mission Reliability, and 2) Mission and 2) Mission Reliability with Reliability with Repair. Repair.

For this tutorial, For this tutorial, select Reliability select Reliability w/Repair.w/Repair.


Step 2 – RBD Analysis Utility Menu

From the RBD From the RBD Analysis Utility Analysis Utility menu, select the menu, select the ‘Set Repair ‘Set Repair Defaults’ option.Defaults’ option.


Step 3 – Edit Project Factors

From the RBD Analysis From the RBD Analysis Utility menu, select the ‘Set Utility menu, select the ‘Set Repair Defaults’ option. Click Repair Defaults’ option. Click on the Edit Project Factors on the Edit Project Factors button and set the values as button and set the values as desired. Click the OK button desired. Click the OK button when you are finished setting when you are finished setting the project factors.the project factors.


Step 4 – Specify Repair Defaults

In this example we tell the In this example we tell the tool to check lower level tool to check lower level items and either populate or items and either populate or correct RBD data, if correct RBD data, if necessary. We also set the necessary. We also set the default mean-time-to-repair to default mean-time-to-repair to 5 minutes.5 minutes.

Since the Use MTBCF and Since the Use MTBCF and MTTRF factors are checked, MTTRF factors are checked, ASENT will use the MTBF ASENT will use the MTBF and MTTR adjustment factors and MTTR adjustment factors specified earlier when we specified earlier when we edited the Project Factors. edited the Project Factors. This is also where we set the This is also where we set the default failover time to default failover time to restore a function.restore a function.

This screen This screen appears after appears after the OK button the OK button is selected.is selected.


Step 5 – Selecting the RBD Analysis Tab

The default model The default model is to model the is to model the blocks in series. blocks in series. When you click on When you click on the RBD Analysis the RBD Analysis tab in the tab in the Reliability Reliability Manager, it will Manager, it will display the display the associated model associated model for the item for the item selected. Click on selected. Click on the Edit option to the Edit option to change or refine change or refine the model.the model.


Step 6 – Editing and Refining the Model

This figure shows This figure shows the reliability the reliability worksheet for the worksheet for the selected item.selected item.

We will change the We will change the model type to model type to parallel by clicking parallel by clicking on the ‘Change on the ‘Change Model Type’ Model Type’ button.button.


Step 7 – Specify Number of Required Elements

Use the ‘+’ and ‘-’ Use the ‘+’ and ‘-’ buttons to increase buttons to increase or decrease the or decrease the number of blocks number of blocks or elements that are or elements that are required for your required for your parallel model.parallel model.

In this example, we In this example, we say that out of the 3 say that out of the 3 elements in our elements in our model that 1 is model that 1 is required, and the required, and the failover time is 5 failover time is 5 minutes.minutes.

The type of calculation used depends The type of calculation used depends on whether or not the failover time is on whether or not the failover time is less than the maximum allowed less than the maximum allowed failover time that was set for the failover time that was set for the project. project.


Step 8 – Reliability with Repair Results

Click on the ‘Show Click on the ‘Show Repair Results’ Repair Results’ button to view the button to view the Reliability with Reliability with Repair results.Repair results.


Step 9 – Select the View Diagram Button

Click on the View Click on the View Diagram button to Diagram button to view the new view the new Reliability Block Reliability Block Diagram.Diagram.


Step 10 – Generating Reports

To generate a report, To generate a report, right-click on the item of right-click on the item of interest and select interest and select Reports | RBD Analysis.Reports | RBD Analysis.


Generating Reports (Continued)

The RBD Analysis The RBD Analysis report allows you to report allows you to report on just the item report on just the item that was selected or the that was selected or the entire subtree. Block entire subtree. Block diagrams can be diagrams can be included or omitted included or omitted depending on the user’s depending on the user’s preference.preference.

Select the report options, Select the report options, as desired, and click on as desired, and click on the OK button.the OK button.


Generating Reports – Sample Report


Generating Reports – Sample Report – Logistics Data

This concludes a brief tutorial on Reliability with Repair. For This concludes a brief tutorial on Reliability with Repair. For more details, please refer to the other RBD Analysis tutorials.more details, please refer to the other RBD Analysis tutorials.

Documents

Reliability-with-Repair.PPT Reliability with Repair Last revised 12/06/2006