Hi Chris, You say "No one knows what notes to put on drawings because of manufacturer constraints, what affects they really have and the differences between manufacturers. Those that do know these notes don't care to share them because every time we do, someone who thinks they know so much better, take pop shots at these notes to prove their superior intelligence." Well, that is not quite true. all the pertinent information is in IPC-D-279; however, since we are dealing with reliability, 279 is a guidelines document not a standard like IPC-6012--that is also the reson why IPC-6012 does not address reliability. Regards, Werner Engelmaier Engelmaier Associates, L.C. Electronic Packaging, Interconnection and Reliability Consulting 7 Jasmine Run Ormond Beach, FL 32174 USA Phone: 386-437-8747, Fax: 386-437-8737, Cell: 386-316-5904 E-mail: [log in to unmask], Website: www.engelmaier.com --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------