Steve.. I am not so sure that an electrical test of single or double sided pwb's, in small quantities, is cost effective. You can inspect the pwb for shorts/opens very effectively with visual inspection. The setup time would probably be much longer. However, for multilayers, since you can not see the internal layers, it should be a requirement! Who wants to fix a bad board ?? At one time, we use to specify 500v, but now we indicate the max voltage that the surface will see in operation. You should also talk to your vendor and agree on the type of data that they will use to test the bare board. They are contractually obligated to produce a pwb that agrees with the manuf. data as supplied by YOU (film or Gerber files) ...they are not mind readers and SHOULD HAVE KNOWN what you wanted. The best data to supply, would be the released net list of the product from the electrical community. In this way, if the pwb designer made a mistake, so VERRRY unlikly, then the design could be reworked with less impact to cost/schedule as related to a stuffed assembly. I am sure that the high volume guys/gals will have their own imputs on this. Hope this helps. Have a good day. Regards, Bob Vanech Norden Systems Norwalk, Ct.