TECHNET Archives

February 2002

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Eric Christison <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 21 Feb 2002 13:10:34 +0000
Content-Type:
text/plain
Parts/Attachments:
text/plain (25 lines)
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,

---------------------------------------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------

ATOM RSS1 RSS2