FWIW In working for a service bureau for a number of years and getting my chestnuts roasted for simple common mistakes (forest throught the trees), I developed a comprehensive design checklist's to cover the more common items that can go wrong. I'm not sure about others, but it seemed to me more often than not I get burned by "old familiarity" rather than "this is critical to the design". Many designers I've met loathe checklist's, stating it's all up here (pointing to their head). God Bless 'em. Murphy's Law is a clear and present danger written in blood across my...... It's sucks when someone tell's you 50k boards are bad because in your rush to get them out and please management you missed one simple thing. Needless to say I like checklist's, as a former Submariner they make sense to me. Perhaps this is why 4 different bosses from 4 different companies had me write their ISO Design Guidelines. Currently working on the 5th and hopefully last for my own company. These checklist's come from 20 years of experience, plus countless other years of experience from othe designers who contributed along the way. They saved my tush on many occasion. Longer winded than I wanted, but the point is, record and review what you learn. Mistakes are human, repeating them is costly. Edward S. Tordahl, CID+, MCSE PCB Designs Unlimited, Inc 131 Faiway Drive Wading River, NY 11792 voice/fax : 631.929.1722 email: [log in to unmask] http://www.pcbdui.com/ __________________________________________________ RISK ~~_/) ~~ ~~~~ A ship in the harbor is safe, but that's not what ships are made for.... __________________________________________________ -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Ken McGee Sent: Friday, July 29, 2005 11:09 To: [log in to unmask] Subject: [TN] design verification Hi Folks, 2 years ago my boss gave me the task of learning board layout. It's something I wanted to learn to do, but have been frustrated on the lack of resources available. Over the past 2 years I've managed to learn quite a bit, and each layout I do is progressively more complicated. The last board I worked on, was a very dense 8 layer board, with several .8 mm BGAs. The board is up and running, but there were several mistakes on it, and will have to be turned. I've been trying to think of ways to check and recheck my designs and I wanted to find out what others do to verify the work they've done. Thanks for any input. Kenneth McGee, C.I.D. Engineering Technician Cyberoptics Semiconductor, Inc. P.O. Box 276 Beaverton, OR 97076 503-495-2200 503-495-2201 (fax) --------------------------------------------------- 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 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- 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 847-615-7100 ext.2815 -----------------------------------------------------