Hello Technetters, Does anyone know of a good reference on how to reasonably set the duration for burn in of products? I haven't been able to locate much information on this topic. Our products are primarily fiber optic telecom equipment. We burn them in at 50 degrees C for 48 hours. This procedure was set up before my time and I do not know how it was arrived at. Lacking any better approach, I would probably put 10 or so units into a long term burn in experiment and measure time to failure. Then, attempt to fit to a Weibull distribution and see if I can get a theoretical model for what percentage will fail after X hours of burn in. I'm not sure if this is reasonable because the sample is small and the time to failure may be quite long. Does anyone know of a better approach? Thanks all! Best regards, Raye Rivera QA Manager * Canoga Perkins 20600 Prairie Street * Chatsworth * CA 91311-6008 818-678-3872 * [log in to unmask] ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- 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 -----------------------------------------------------