Book excerpt: This package provides an overview of End-to-End testing and answers the most common questions a relay tester should ask before performing their first End-to-End test. A basic introduction of this test technique is followed by a step-by-step procedure for performing a successful end-to-end test. This package also includes an overview of the most common communication-assisted protection schemes to help the reader understand how these schemes operate. Go to http: //relaytraining.com/product/end-to-end-testing-print/ for more information. This paper will NOT be part of the final Relay Testing Handbook.