October 6, 2008 Check out IPC-2221/IPC-D-325 drawing requirements; it may answer your question. Also, the IPC has recently developed a series of standards that will replace IPC-D-325. These new standards are intended to form a series of electronic formatted PWB and PWA documentation requirements, including what some folks at IPC call the "Perfect BOM". With regard to SAP, we have several OEMs who use SAP; however, drawing numbers are generated via CAD and not SAP. If your CAD system does not talk electronically directly to SAP, this normally requires someone to manually re-enter the BOM information from the CAD drawings into SAP. This is double work and increases the risk of errors between the two different electrtonic databases. >From: "Kuczynski, Michael (MED US)" <[log in to unmask]> >Reply-To: TechNet E-Mail Forum <[log in to unmask]>, "Kuczynski, >Michael (MED US)" <[log in to unmask]> >To: [log in to unmask] >Subject: [TN] PCB Documentation >Date: Mon, 6 Oct 2008 19:07:14 -0400 > >Our company has begun "Corporate Initiates", where we're trying to align >multiple sites in using the same practices, shared resources, blah, >blah, blah. One of the many "teams" formed is addressing part numbering. > >Now each and site (as well as everyplace I've EVER worked), in regard to >part numbering for printed circuit boards has been similar. There is a >base number and all the related reference documentation contains that >base number, but is unique'd by prefix and/or suffix. So there was never >any doubt/guessing what the part number for a drawing was. Example: >(each drawing has a separate revision) > >12345-1:A (bill of materials/parts list) > AW12345:A assembly drawing > DR12345:A drill/fabrication drawing > PA12345:A schematic drawing > PC12345:A artwork/gerber files > >(we no longer us "smart part numbering" for components - its just >random, sequential numbers) We will be transitioning/migrating to parts >database management system, SAP. Because the system can not >"automatically generate these part numbers" (as we're use to seeing), it >wants to "auto-generate" part numbers. So it may look something like: > >12345678 > 12345679 assembly drawing > 12345683 drill/fabrication drawing > 12345689 schematic drawing > 12345721 artwork/gerber files > >I need supporting "business reasons" WHY we CAN'T use random >auto-generated part numbering for our documentation. Their argument is >anyone who has access to the SAP system, can find what their looking >for, so the part numbers don't matter. When we send our data out to the >vendors for fab and assembly, we send all the supporting documentation. > >So aside from thinking this is stupid and the ol' "it's ALWAYS been like >that, I'm finding a hard time shooting holes in their argument. >LOGICALLY, the way its always been, seems best, but unless I come up >with some supporting/alternate views, this is going to be a confusing >mess. > >So if anyone can help me out here - please help me stop the insanity. >(or maybe I've been "integrated" too long) > >Thanks In Advance > > >SIEMENS >Michael Kuczynski Medical Healthcare Diagnostics Inc. >Product Eng. II CID 511 Benedict Ave. >914-524-3118 (Ph) Tarrytown, NY >914-524-3322 (Fax) Mail Stop P25-1-C >[log in to unmask] > > > >---------------------------------------------------------------------------- >This message and any included attachments are from Siemens Medical >Solutions >and are intended only for the addressee(s). >The information contained herein may include trade secrets or privileged or >otherwise confidential information. Unauthorized review, forwarding, >printing, >copying, distributing, or using such information is strictly prohibited and >may >be unlawful. 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