Project Recalculation

When the reliability parameters for components are provided you may perform recalculation of the Product Tree to get the calculation of Failure Rate for all components and then calculate the sum of component failure rates to calculate the FR of assemblies, subsystems, systems and of the whole product.

You can perform full or quick calculations. You can also assign a required FR to an assembly and have RAM Commander allocate the required FR to each of its children.

After calculating, RAM Commander displays the item reliability in the Opr. FR column (when working under Operating analysis) and other results for other analyses. The symbols "++" in the status field mean that the item has been successfully checked and calculated. If there was an error during the computation (due to missing data or other reasons), the symbol "-" appears in the status field.

Quick Mode

When calculating in quick mode, RAM Commander computes R&M using the entire product tree and recalculates items changed since the previous calculation, as well as items for which some conditions have changed.

Note: Changes in defaults do not immediately affect the product tree reliability. You must Recalculate all the entire tree to use the new defaults.

To calculate reliability in Quick mode:

1.	Activate the Product tree view.

2.	If you need to change the Current Analysis, do the following:

Click a corresponding icon on the Product tree view button bar.

- OR -

From the Project menu, choose Configuration.

3.	Choose the current analysis in the Project Configuration dialog box.

4.	Choose OK.

5.	From the Calculation menu, choose Quick.

Note There is an option of automatic recalculation when defining the project properties to ensure that the RAM Commander output is based on the latest updated data (see Creating a new project ).

RAM Commander computes reliability for the entire product tree. Reliability results appear in the Product tree view.

Recalculate All

In Recalculate All mode, RAM Commander applies defaults for all items and computes R&M for the entire project. Defaults are only applied to fields containing three hyphens (---). If a field has an actual value, RAM Commander uses that to compute reliability.

To calculate reliability in Recalculate All mode:

1.	Activate the Product tree view.

2.	From the Project menu, choose Configuration. Select the current analysis in the Project Configuration dialog box or using the Product tree view button bar.

3.	From the Calculation menu, choose Recalculate All.

RAM Commander computes reliability using the item's current data and current defaults. Reliability results appear in the Product tree view.