A customer of mine who manufactures mostly class 2 or 3 products has (or had) the following procedure: They define two own classes for PWBs and assemblies. The "lower" class refers to in-house standards, IEC359 and DIN IEC 326, the "higher" to MIL-P-46843, -P-55110, -STD-275, -STD-454, and DOD-STD-2000-1 to -4. The copy of the jumper wire procedure itself is from 1991, and I assume they have meanwhile these definitions updated to IPC-222x and other newer standards. The "lower" class has the following rules: a) max numbers of ALL repairs, added components, jumper wires etc. PCB size in cm^2 number < 100: 5 100-300: 10 300-600: 15 > 600: 20 b) jumper wires and added components < 100: 3 100-300: 6 300-600: 9 > 600: 12 The "higher" class allows no repairs. For repair they refer to IPC-R-700 and MIL-C-28809, but mostly to other in-house procedures. Hope this helps. Regards Matthias Mansfeld ----------------------------------------------- Matthias Mansfeld Elektronik * Printed Circuit Board Design and Assembly Am Langhoelzl 11, D-85540 Haar, GERMANY Phone: +49-89-4620 0937, Fax: +49-89-4620 0938 E-Mail: [log in to unmask] Internet: http://www.mansfeld-elektronik.de ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################