Cumulative damage model explanation

[MarkT]

In the Alta 7 accelerated life testing reference, page 286, the following statement is made:

"In formulating this model, it is assumed that the remaining life of the test units depends only on the cumulative exposure the units have seen and that the units do not "remember" how such exposure was accumulated."

Can someone from Reliasoft possibly explain what is meant by the unit remembering how the exposure was accumulated please? I'm looking at this from an electronics perspective and I can't see how a test unit would remember exposure accumulation, but perhaps I'm looking at it in the wrong way.

Thanks,
Mark

[David]

Hi Mark,

The sentence to which you are referring actually states that the "...units do not remember...". The model assumes the units do not know how the damage was accummulated.

I hope this helps.