Greg, I am assuming by commercial that you are referring to the screening process. Obviously commercial temperature parts can not be put in place of military temperature parts. But many manufacturers, produce the military temperature range parts without the military screening. We have experienced this same problem in the past. It really depends on your requirements to the military. In our case, the contract read that the part would be 883 or equivalent. Because of that, we were able to test the parts with an outside testing agency (because the JAN or 883 part was not made) and then do a system test where we showed that the whole system would run at the temperate that was specified in the design. Again we were able to do that because of how our contract was worded. In the long run, I would say that a good statistician could show that todays manufacturing SPC processes produce far more reliable parts than military screening systems ever did. There has been a lot of research done on reliability of plastic Vs ceramic packages and 883 screens Vs Commercial. You might try doing some research on the Web using reliability, Integrated Circuits, Military, and packages as your search criteria. There was one web site (I don't have the URL) called the Reliability Analysis Center (RAC) that has a lot useful information on it. Some sources you may want to talk to are the component manufacturers themselves. I believe Motorola discontinued their whole military program and they probably have statistical data to show how good their parts are Vs the military screen. I hope you can share any great information you collect. Max Bernhardt Woodward Governor Co. 970-962-7376 ---------- From: Greg Byram To: [log in to unmask] Subject: Commercial components in Military apps. Date: Wednesday, March 12, 1997 8:41AM I am trying to gather information and reference sources to qualify commercial components for military applications. Specifically why the specification differences and how I may qualify the commercial parts. Any help in information and/or reference material would be greatly appreciated. Greg ************************************************************************ *** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * ************************************************************************ *** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * ************************************************************************ *** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ************************************************************************ *** *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************