Just to be clear, the DNI'd parts have no Manufacturer name, P/N, and the description is set to "Do Not Install"; the reference designator is filled in with all the locations that are such. I have had assembly persons ask about part locations that were not listed on the BOM. Shawn Upton, KB1CKT Test Engineer Allegro MicroSystems, Inc [log in to unmask] 603.626.2429/fax: 603.641.5336 -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Ioan Tempea Sent: Tuesday, December 08, 2009 11:04 AM To: [log in to unmask] Subject: Re: [TN] PCB parts that are not installed The best method Shawn is the components that will not be populated do not show in the BOM. Why should they be there, as they will require removal at the assembly level anyways? Ioan Tempea, ing. Ingénieur Principal de Fabrication / Senior Manufacturing Engineer T | 450.967.7100 ext.244 E | [log in to unmask] W | www.digico.cc N’imprimer que si nécessaire – Print only if you must -----Message d'origine----- De : John Goulet [mailto:[log in to unmask]] Envoyé : Tuesday, December 08, 2009 10:59 AM À : [log in to unmask] Objet : Re: [TN] PCB parts that are not installed DNI is used normally used for the specific assembly process. An SMT part may need to be installed after SMT for clearance of selective solder height reasons. The kitting department needs to know which kit to put the part: SMT, pre-wave, post wave, mechanical or test. If the customer has the part on the BOM then it has to be purchased and kitted but in the correct kit. Occasionally there may be a manufacturing deviation to send a part with the board separately when there was a design or part spec problem on the prototype. Hope this helps. J. Goulet Sr. Process Engineer ----- Original Message ----- From: "Shawn Upton" <[log in to unmask]> To: [log in to unmask] Sent: Tuesday, December 8, 2009 10:36:16 AM GMT -05:00 US/Canada Eastern Subject: [TN] PCB parts that are not installed Quick question: What is the best method of specifying parts that are not installed on a PCB assembly? I've used "DNI" for a while, while others have used "TBD" or "DNK" (for Do Not Kit). "TBD" was used for locations which would be stuffed after some testing--maybe 1.01k had to be used on this assembly, 1.05k on another, etc. What is typical method on this? For parts that are intentionally not installed, and parts that may be installed at a later date. Also, just to verify: is it generally desirably to list all parts that are not installed on a board? I usually list all parts, installed or not, and the parts not installed are specifically listed as "Do Not Install", so as to make it clear that they are DNI'd. Shawn Upton, KB1CKT Test Engineer Allegro MicroSystems, Inc [log in to unmask] 603.626.2429/fax: 603.641.5336 --------------------------------------------------- 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 ----------------------------------------------------- --------------------------------------------------- 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 -----------------------------------------------------