Related Topics:

Recurrent Event Data Analysis

Parametric RDA Folio

The parametric RDA folio uses the General Renewal Process (GRP) model to analyze the failure behavior of a repairable system. The GRP analysis method takes into account the effectiveness of repairs on the condition of the system. For example, a repair may bring the system to an as-good-as-new condition, to an as-bad-as-old condition or to some stage in between. If the system is only partially rejuvenated after the repair, then this may affect how the system fails in the future. Over time, the recurrence rate of failures may remain constant, increase or decrease. The GRP model allows you to analyze the failure behavior of a partially restored system over time so you can obtain estimates such as the cumulative number of failures, mean time between failures (MTBF) and failure intensity. The ReliaWiki resource portal has more information on the GRP model at: http://www.ReliaWiki.org/index.php/Parametric_Recurrent_Event_Data_Analysis.

Setting up the Folio

To create a parametric RDA folio, choose Insert > Folios > Parametric RDA or right-click the Specialized Folios folder in the current project explorer and choose Add Parametric RDA on the shortcut menu.

The following picture shows an example of a parametric RDA folio data sheet.

The data sheet contains the following information:

Notice that the repair times of the motors are not recorded in the data sheet. This is because the GRP model assumes that the repair times are negligible and only the effects of the repairs on the condition of the system are of concern. Therefore, each data point in the data sheet can be treated as a single fail-and-repair process.

 

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