Hi Mike,
Q: "As I understand it, IST and T-cycling give similar but not necessarily
identical results that prohibit making such statements as X IST cycles is
equivalent to Y T-cycles.  Is that right?"
A: No that is not correct. We simply do not have enough proper data to make
the quanitative correlation. With the proper data, a model can be constructed
which will give acceleration factors.
Q: "My question is how certain are we of the correlation between either method
and actual board performance."
A: Lot of work has been done to correlate T-cycling with actual performance
and an acceleration model for barrel cracking exists. No model exists for
innerlayer separation.

Regards,
Werner Engelmaier

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