The Before-image shows the result of an assessment we were tasked with by one of our customers who apparently had issues with managing the complexity of their product line development: variability was managed using different concepts at different stages of the development lifecycle, out of synch, without any chance for consistency.


The After-image shows the basic idea of PLE to extract varibility information to a central model (in this case the so called Feature Model)  that allows expressing variability, their dependencies on a higher abstraction level and in a central place, in a neat and consistent manner.

And the Disclaimer: Any Resemblance to Your Actual Situation is Purely Coincidental (but not without any reason).