Uncontrolled sure jumps out - doesn't it. For starters, get a copy of MIL-STD-883E and enjoy. HALT or HAST testing is what you want to determine initial quality and long term reliability. The STD talks this talk and provides all possible test and analysis requirements, in a controlled environment, to do the job. Other procedures, standards, and specifications are available concerning FAA, NASA, medical, and others possibly more pertinent to your requirements. MoonMan --------------------------------------------------------------------------------- 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 the following message: SET Technet NOMAIL 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 ---------------------------------------------------------------------------------