Hello All, A colleague asked us the following question and we thought it would be good to post on TechNet. "Is anyone aware of a spreadsheet that can calculate acceleration factors for conversion of PCB cycles to failure from one thermal cycle (e.g. -40/125C) to another (-20/80C)? Looking at IPC-TR-579 (Round Robin Reliability Evaluation of Small Diameter PTHs in PWBs), it seems like the equations presented in section 7 (e.g. Eq. 6) could be used to do this." Best regards, Paul Reid --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------