Weibull++ Version 2021 Online Help
Using Life-Stress Data Folios
Weibull++'s life-stress data
folio allows you to perform quantitative accelerated life
testing data analysis. In this analysis, you extrapolate a product’s
failure behavior at normal conditions from life data obtained
at accelerated stress levels. Since products fail more quickly
at accelerated stress levels, the analysis allows you to obtain
reliability information about a product (e.g., mean life, probability
of failure at a specific time, etc.) in a shorter time.
The basic steps for using a life-stress data folio are:
- Add
life-stress data folio
Right-click the Life-Stress Data folder in the current
project explorer and choose Add
Life-Stress Data.
In the setup window, select the desired censoring type
and units for time/usage values (hours, cycles, etc.).
(See Accelerated Life
Testing Life-Stress Data Folio Setup.)
On the next page, define the stress type(s) to use in
the analysis and the use stress level.
- Enter
data
- Analyze
data
Click the Calculate
icon on the control panel.
The Analysis Summary area displays the parameters of
the distribution. Click the Detailed
Summary icon to view more
information.
- View
plots
Click the Plot
icon on the control panel to open the plot sheet.
(See Accelerated Life Testing Plots
for available plot types.)
To show the confidence bounds, click the Confidence
Bounds link on the plot's control panel, and then
set the desired type of bounds and confidence level.
- Calculate
metrics