Manual FR Table Data Entry

When you enter data manually into a failure rate table, you must specify the temperature and its associated known failure rate for each environment.

To manually create a new failure rate table:

1.	Activate the Product tree view.

2.	Open the GPRD Library.

3.	Select Global or Project library in the View menu (project library is opened by default). If the Project library is selected, the component data you enter can only be used in the project where it is created.

4.	Open an existing Part screen or create a new Part record.

5.	In the General Part Data screen, click either Operating or Non-Operating; the field FR table appears.

6.	Select FR or MTBF in the second list box under Part number.

Enter FR or MTBF according to the temperatures in the table for all temperature values that you have reliability data. The failure rates must be expressed in terms of 10-6 or FIT, depending on what is displayed in the list box under Part number. As you make new entries in the failure table, RAM Commander redraws the failure rate graph.

8.	If you want to limit the extrapolation, enter a value larger than your minimum temperature in the Tmin field and a value smaller than your maximum temperature in the Tmax field.

Click to select the "Use for conversion" check box to define one of the environments as default. This table is now set as the default for a specified environment and for the specified Part number. If you try to perform calculation for this Part number and for other environments, which do not have FR Table data, the program will use the default environment for this Part number and convert it automatically to the required environment, using the Toolkit conversion coefficients.

10.	Click Close.

You have built a table of field failure rate data that is now ready to be used in reliability calculations for the other product tree parts. Choose "GPRD" as a reliability prediction method for parts with GPRD FR table and RAM Commander will calculate the Failure Rate.