Vernon ; good question
if TH ; we saw nothing on 3 year stat charts from field ( may be damaged
, but still works );
VERY different on SMD's , we still validate , vibrate , with occasional
shocking revelations on what the test finds and what it misses .
One classic, Earl mentioned on lucky accident on BGA's knock off on
exactly your subject .
This is the reason why I sift through web in odd times .
Whatever you do , do not buy XRay to find this fractures . You won't .
Even live cycling will not discover the extend of stress .
Now I have to make another revision in procedures with a carrot & stick
behind because it is not quite a human nature to run to Steve reporting
his $ 7000 xx layer achievement has been unduly tested just after ICT
pass .
How do I extend the gospel enforcement from floor (relatively easy) to
store (relatively impossible) I hope somebody will tell me .
Beats me

See you

Paul Klasek
http://www.resmed.com

> ----------
> From:         Vernon Presnell[SMTP:[log in to unmask]]
> Sent:         Friday, 31 July 1998 2:30
> To:   [log in to unmask]
> Subject:      [TN] Dropped boards
>
> Does any one have any experience with evaluating the reliability of
> dropped PWB assemblies?
>
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