Hi Alain, The following documents may provide the information: IPC-7912 Calculation of DPMO & Manufacturing Indices for Printed Board Assemblies IPC-9191 General Guidelines for Implementation of SPC IPC-9261 In-Process DPMO and Estimated Yield for PWAs Steve Sauer -----Original Message----- From: Alain Savard [mailto:[log in to unmask]] Is there an IPC guideline concerning the sampling of assemblies for inspection? Something similar to IPC-6012A table 4-2 for Fab boards, but for assembled boards. --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------