Many new tech have limited stability for one reason. In addition, the bathtub failure curve, you need to root out early failure. (believe me, burn in will root out something design over looked or unit operated on the cutting edge spec) . As for exemption, you need to find pm who is willing to put his head on line. https://www.tjgreenllc.com/2016/09/20/new-release-of-mil-std-883-visual-inspection-criteria/ Sent from my BlackBerry 10 smartphone. Original Message From: Daragh OLoughlin Sent: Saturday, May 26, 2018 07:56 To: [log in to unmask] Reply To: TechNet E-Mail Forum Subject: [TN] MIL-STD-833 Method 1015 Can anyone shed some light on the rationale behind the Post Burn-In 96 hr window defined in MIL-STD-833 Method 1015? I am trying to understand this, to determine the risk of excluding this requirement from the Burn-In process in a high reliability IPC Class 3 application. Daragh OLoughlin Lead NPI Engineer - Implant Electronics Cochlear Limited 12 Helen Street Newstead QLD 4006 AUSTRALIA Email: [log in to unmask] www.cochlear.com ============================================== "The information contained in this e-mail message may be confidential information, and may also be privileged. If you are not the intended recipient, any use, interference with, disclosure or copying of this material is unauthorised and prohibited. If you have received this message in error, please notify us by return email and delete the original message."