Hi Rick, Yes, we use a 2 BOM system for all mixed technology boards. The main reason is so we can have an intermediate kanban for the SMT level only. This helps us balance the SMT line load more evenly due to run and changeover time variation, and allows for much smaller through hole runs. It also comes in handy when you have to scrap boards during the SMT run without having to manually "return" the through hole parts that weren't used. I have worked for 4 different OEM's and they all used this approach for the same reasons. Cheers, Larry -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Smith, Rick Sent: Tuesday, November 30, 2010 8:30 AM To: [log in to unmask] Subject: [TN] Separate BOM's for Same Assembly Hi Folks, Engineering currently produces two separate BOM's for a single board assembly, 1 for SMD's and the other for PTH parts which are subsequently entered into the ERP system by Doc Control. Without going into a lot of detail I understand the reasons for the separate BOM's are related to production logistics, routings and cost. I am told this is typical in the industry for OEM's and would like to either corroborate or debunk this with your responses. I am trying to determine if the 2 BOM system is necessitated by ERP limitations or the result of a misguided approach to process development. Does anyone use the two BOM approach for a single board assembly? Thanks! Regards, Rick ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 ----------------------------------------------------- Please be advised that this email may contain confidential information. If you are not the intended recipient, please notify us by email by replying to the sender and delete this message. The sender disclaims that the content of this email constitutes an offer to enter into, or the acceptance of, any agreement; provided that the foregoing does not invalidate the binding effect of any digital or other electronic reproduction of a manual signature that is included in any attachment. ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 -----------------------------------------------------