The pdf is a function of time and stress. For this reason, a 2-dimensional plot of the pdf vs. Time at a given stress and a 3-dimensional plot of the pdf vs. Time and Stress can be obtained in ALTA.
Figure 5: 2D pdf plot
Figure 6: 3D pdf plot
A pdf plot represents the relative frequency of failures as a function of time and stress. Although the pdf plot is less important in most reliability applications than the other plots available in ALTA, it provides a good way of visualizing the distribution and its characteristics such as its shape, skewness, mode, etc.
See Also:
Plots
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