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The Degradation tab is visible when you view either a Weibull++ or ALTA degradation folio data sheet for degradation analysis.
Calculate
In a Weibull++ degradation folio, it extrapolates the times at which the degradation will reach the critical degradation level (i.e., the times at which the degradation is serious enough that the unit is considered to be failed), and then performs life data analysis on the extrapolated times.
In an ALTA degradation folio, it performs accelerated life testing analysis on the extrapolated times at the accelerated stress level to extrapolate failure times to normal use conditions.
Plot
creates a new sheet in the folio that provides a choice of applicable
plot types. This includes the degradation vs. time plot, which displays
the degradation of each unit over time.
In a Weibull++ degradation folio, the plot sheet includes the life data analysis plots.
In an ALTA degradation folio, the plot sheet includes accelerated life data analysis plots that are based on the failure times at normal use conditions.
Quick Calculation
Pad opens the Quick Calculation
Pad, which allows you to calculate results identical to the calculations
you can perform in a Weibull++ standard folio QCP or an ALTA standard
folio QCP.
Model Wizard
opens the Degradation Model Wizard,
which helps you select the degradation model that best fits your data.
Distribution
Wizard opens the Distribution
Wizard, which helps you select the distribution that best fits the
data set based on the chosen parameter estimation method (i.e., RRX or
RRY). In the degradation folio, the ranking in the Distribution Wizard
is based on the life data model.
Transfer Life
Data to New Folio allows you to transfer the extrapolated failure
and suspension times to a new standard folio.
Transfer Life
Data to Selected Folio allows you to transfer the extrapolated
failure and suspension times to an existing standard folio.
Note: If you are using an ALTA degradation folio, the icons show the ALTA version.
Publish Model
publishes the chosen distribution as a model
for use throughout the project, in any Synthesis application where models
are used. See Publishing Models.
Override Plot
Color opens the Override Plot Color window, which allows you to
ignore the default colors of the plotted line and points, and apply a
color that you specify. This setting is activated in the source data sheet
of the plot. This means that when you enable the setting for a particular
data sheet, it applies only to the plots that you create for that data
sheet and not the plots for all other data sheets that may be within the
same folio. Note that only the colors of the lines and points are affected.
Other settings such as the line style and thickness, or the point size
and shape are based on the settings that you have specified in the Plot Items page of the
Plot Setup window.
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