Defects on circuit board assemblies are often measured in Defects Per Million Opportunities, or DPMO. IPC has several publications that describe DPMO calculations. If you are interested in software that calculates the opportunity count based on the CAD file and the DPMO based on defects that are entered, see my post yesterday about software that we use from Tecnomatix-Unicam. Dave Roach Trane GCC 4833 White Bear Parkway St. Paul, Minnesota 55110 651-407-4294 -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Jason Sent: Wednesday, March 30, 2005 1:17 PM To: [log in to unmask] Subject: [TN] SPC on Process control Trying to implement SPC measurements on our SMT line, what are some typical measurements taken for SMT process? Thanks for the help, I hope this question is not to broad, Thanks, Jason --------------------------------------------------- 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 -----------------------------------------------------