Relation plot
main topic  

The relation plot displays failure time versus an accelerating variable. By default, lines are drawn at the 10th, 50th, and 90th percentiles. The 50th percentile is a good estimate for the time a part will last for the given conditions. For an illustration, see Example of accelerated life testing.

You can optionally specify up to 10 percentiles to plot and display the failure times (exact failure time or midpoint of interval for interval censored observation) on the plot. You can enter design value(s) to include on the plot(s).

The relation plot(s) displayed depend on the number of predictors in your model:

·    When you have one accelerating variable, one relation plot is displayed.

·    When you have two accelerating variable, two relation plots are displayed. The first plot contains the first accelerating variable on the x-axis and is held at each level of the second accelerating variable.

·    When you have one accelerating variable and one factor, one relation plot is displayed. The accelerating variable is on the x-axis and is held at each level of the factor.