I've been hanging around signal integrity and jitter measurements for a few years, much more than burn-in. Hence, I think of bathtub curves in regards to estimating bit-error-rate versus sampling location on an eye diagram.
Being very flippant I wonder if the builders of Stonehenge ever visualised a Bathtub curve for its programmed life?
Nice article takes me back to my equipment test days with safety critical systems. In maintenance it's knowing which bits to replace and the bits not to replace. Airlines found this out to their cost a long time ago. Lets hope they remember thier lessons.