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Repairable Systems SimuMatic

Repairable Systems SimuMatic Example

SimuMatic Folio

The Repairable Systems SimuMatic folio gives you access to the generated data sets and to the results of analyses performed automatically for those data sets. This topic includes information about various elements of this folio, including:

Control Panel

As an example, the following picture shows the settings that are used for the Failure Times data type. The settings show the type of data (Developmental – Failure Times), parameter estimation method (MLE), confidence bounds method (Crow), whether a gap interval has been defined in the analysis (No Gap) and whether the failure times are entered as cumulative or non-cumulative (Cumulative).

Simulation Sheet

The Simulation sheet shows the parameters calculated for each data set. It also contains a separate column for each of the calculations that you specified on the Analysis and Results tabs of the setup window. The following columns may be included in the Simulation sheet, depending on the metrics you chose to calculate in the RGA SimuMatic Setup window.

As an example, the following picture shows the results from the first ten data sets for a particular simulation. In this case, the analysts chose to display only the Crow-AMSAA model parameters (Beta and Lambda), the growth rate, the instantaneous MTBF at 15,000 hours (IMTBF(15000) and the lower confidence bound on the time at which the demonstrated MTBF reached a specified target value (Target DMTBF).

Sorted Sheet

In the Sorted sheet, the calculated values from the Simulation sheet are sorted from least to greatest in order to show the confidence bounds. The Percentage column displays the percentage of data sets that are equal to or less than a given data set. So, for example, if you wished to obtain the 90% lower one-sided confidence bound on the instantaneous MTBF at 15,000 hours, you would look up the value of IMTBF(15000) (Hr) that corresponds to 10% (i.e., 100% - 90%), as shown next.

Alternatively, if you wished to obtain the 90% two-sided confidence bounds of IMTBF(15,000), you would look up the values that correspond to 5% (for the lower bound) and 95% (for the upper bound), as illustrated in the next figure.

Plot Sheet

In the plot sheet, five different kinds of plots are available in the Plot Type drop-down list on the control panel.

The following options on the plot sheet are unique to SimuMatic plots. They allow you to control which elements will be displayed on the plot. See Plots for information about the features that are common to all (or most) plot sheets (such as plot setup, RS Draw, aspect ratio, etc.).

 

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