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The Warranty tab is visible when you view a warranty folio data sheet for warranty analysis.
Calculate
converts the warranty claims data to failure/suspension times and then
estimates the parameters of the chosen life distribution based on the
converted data. If you select the Use
Subsets option on the Main page of the control panel, the parameters
of the distribution of each subset ID will be calculated separately.
Plot
creates a new sheet in the folio that provides a choice of applicable
plot types. In warranty
analysis folios, this includes plots such as expected failures vs. period,
reliability vs. time, probability plot, etc. You can plot the data in
the warranty analysis folio with or without a forecast.
Quick Calculation
Pad opens the Weibull++
Quick Calculation Pad, which allows you to calculate life data analysis
metrics. It uses the same calculations that you can perform in a Weibull++
standard folio QCP.
Distribution
Wizard opens the Distribution
Wizard, which helps you select the distribution that best fits your
data based on the selected parameter estimation method (i.e., RRX, RRY
or MLE). In warranty analysis folios, the ranking in the Distribution
Wizard is based on the converted failure/suspension times.
Forecast
opens the Forecast
Setup window, which allows you to specify the time periods at which
to estimate the number of expected warranty returns. Clicking Forecast
before the parameters have been calculated will automatically calculate
the parameters and open the Forecast Setup window.
Restore Guide
Colors restores the colors of the cells in the data sheet to the
default guide colors. This command applies only if you have altered the
cell colors of the Returns sheet in a Nevada chart format warranty folio.
(The colors can be altered by selecting the desired cells or row/column
heading and then choosing Home > Edit
> Format Selection > Fill Color). Guide colors are used in
the Statistical
Process Control feature of the Nevada chart format. The default guide
colors are:
Green for the number of product returns that are within the expected range.
Yellow for the number of product returns that are between the caution and critical levels.
Red for the number of product returns that are above the critical range.
Data Sheet
Setup is available only for the Nevada chart format. It opens the
Warranty Setup
window, which allows you to change the time periods of the warranty
claims data in the current data sheet.
Convert Data
converts the format of the currently active warranty analysis folio to
a new format. Converting formats creates a new folio and does not overwrite
the contents of the existing folio. It is an automatic process, except
when converting from the Dates of Failure format to Nevada chart format.
In that case, you will be prompted to define the time unit of each period
(e.g., dates, month or years) in order to proceed with the conversion.
The following table shows the data conversion options.
| From | Convert To |
| Nevada Chart Format | Times-To-Failure Format |
| Dates of Failure Format | |
| Usage Format | Times-To-Failure Format |
| Dates of Failure Format | Times-To-Failure Format |
| Nevada Chart Format | |
| Times-to-Failure Format | N/A |
Transfer Life
Data to New Folio allows you to transfer the failure/suspension
times to a new Weibull++ standard folio in order to perform life data
analysis.
Transfer Life
Data to Selected Folio allows you to transfer the failure/suspension
times to an existing Weibull++ standard folio in order to perform life
data analysis.
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