Field Failure Rate Tables

Very often a reliability engineer has to deal with the problem of unspecified failure rates. The GPRD FR Tables utility provides an effective solution to the problem of unspecified failure rates.

If you have existing field data for reliability prediction and analysis, you can store them in a failure rate table. You can then apply the observed failure rates to tree items and thus override the results based on the standard prediction method. The GPRD FR Table utility allows you to define separate tables for different environments and temperature-failure rate combinations:

GPRD_FR

Note: The GPRD-field FR table allows you to avoid inaccurate temperature curves or mission profile analysis reports when failure rates are entered manually for a specific temperature-failure rate combination.

RAM Commander extrapolates or interpolates the failure rate for temperatures that are not explicitly defined. Data may be entered for one environment only, and then RAM Commander will use RAC Toolkit formulas to convert this data to different environment according to settings in your specific product tree.

The GPRD-field FR table utility is useful when you need to:

•	Perform a reliability analysis for any temperature if you have failure rates for only a few temperature values.

•	Apply reliability values to different assemblies in one project or in several projects.

•	Access reliability data for a project, even though you are not authorized to review the project’s actual components (such as for security reasons).

Data can be entered to the reliability prediction table by 3 methods: manually, using import or as a "packed box".