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Thu, 21 Feb 2002 18:05:28 -0700 |
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Erik,
To even consider this requires throwing common sense out the window!
Do not try to save money or time no matter what it costs.
Just my opinion>
David A. Douthit
Manager
LoCan LLC
Eric Christison wrote:
> Fellow Technetters,
>
> I'm in the middle of a 'frank and forthright' discussion at the moment on whether it is possible to justify substituting a set of environmental
> tests carried out in parallel on a device i.e.. 10 devices go through vibration, another 10 go through high temp operating etc... for a customer
> requirement for sequential testing i.e. take 10 devices and put them through all the tests.
>
> I'm of the opinion that even if you up the severity of each parallel test it still isn't the same as a sequential test because you won't catch the
> failure mechanisms that results from a combination of effects e.g.. high humidity weakening an adhesive joint which then fails the shock test. You
> wouldn't see a failure if you tested 10 devices for high humidity and another 10 for shock.
>
> I'd be interested in some opinions or some literature references which discuss this issue.
>
> Regards,
>
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