I have a NEBS Certification and I've made changes; how to I know whether to retest or not?

The following forms will help you make the decision on whether to test or not:

NEBS Retest Form (Blank)

NEBS Retest Form (DC to DC Converter Example)

NEBS Retest Form (Second Source Example)

Also, check out Maintaining Your NEBS Certification by Dave Lorusso, in Compliance Engineering magazine's 2003 Annual Guide.