I think engine rpm and T's and P's are already recorded for disk life limit calculations, but I'm getting out of my depth here. I Agree 100%. As for wings, I assume these days what with data storage, miniature accelerometers, etc. it is possible to integrate strain (or an analogue of strain) with respect to time and store the results, thus being able to distinguish between aircraft with different duty cycles and environments.
Time to come up and take a deep breath of reality
Nobody's got the time to records and calculate the infinite variations in duty cycles and stress.
The cyclic life is typically predicated on a statistical stress level and duty cycle. Sometimes even an overstress condition (above the typical stress) can lengthen the cycle life considerably. confusing isn't it???
sorry about the rambling ... but its cocktail time here and I'm feeling it