Degradation Plot Sheet

After you analyze the degradation data, you can create plots of your results by choosing Degradation > Analysis > Plot or by clicking the Plot icon on the Main page of the control panel.

The Plot Type area on the plot sheet of the control panel allows you to select the type of plot you wish to view and the units of measurement you want the x-axis of the plot to be displayed in.

Nondestructive Degradation Folio Plots

In addition to the standard life data/life-stress data analysis plots, you can view the following plots, which pertain specifically to the extrapolation of failure times from the degradation measurements.

• Degradation vs. Time (Linear) plots the degradation of each test unit over time, using a linear scale for time and degradation. A thick horizontal line marks the critical degradation level (i.e., the level at which a unit is considered failed) that was specified on the Main page of the control panel. You can use this plot to visualize how failure times were extrapolated for each unit.

• Degradation vs. Time (Log) plots the same information as the Degradation vs. Time (Linear) plot, but using logarithmic axes for time and degradation.

The Unit IDs area of the control panel will display the unit IDs you entered in the data sheet of the folio. To remove a test unit from the plot, clear the associated check box.

Destructive Degradation Folio Plots

The following plots are available for the destructive degradation folios. The last two degradation plots pertain specifically to the degradation model based on the fitted measurement distribution.

• Reliability vs. Time

• Unreliability vs. Time

• Pdf Plot

• Failure Rate vs. Time

• Degradation vs. Time (Linear) shows the effect of time on the degradation measurements, using a linear scale for time and degradation. Multiple pdfs, each at a different inspection time, are displayed on the plot. The measurements obtained at each time are shown at the base of the associated pdf.

  A degradation line will be displayed over the pdfs, which shows how the measurement distribution's location parameter changes over time. And a thick horizontal line marks the critical degradation level (i.e., the level at which a unit is considered failed) that was specified on the Main page of the control panel.

• Degradation vs. Time (Log) plots the same information as the Degradation vs. Time (Linear) plot, but using logarithmic axes for time and degradation.