This explains how Elexon tests changes to the BSC software, systems and processes, including the different types of testing.

13.0

<div data-id="purpose-1.Testing" style="text-align:left">1.Testing Process Overview</div>

<html><head></head><body><div data-id="stage-1-and-stage-2" style="text-align:left"><u class="defined-term">Stage</u> 1 and <u class="defined-term">Stage</u> 2: Design and Development</div></body></html>

<html><head></head><body><div data-id="stage-3" style="text-align:left"><u class="defined-term">Stage</u> 3: Factory <u class="defined-term">Acceptance</u> Testing</div></body></html>

<html><head></head><body><div data-id="stage-4" style="text-align:left"><u class="defined-term">Stage</u> 4: Operational <u class="defined-term">Acceptance</u> and Integration Testing</div></body></html>

<div data-id="service-provider-and-test-participant-support" style="text-align:left">Service Provider and Test Participant Support</div>

<div data-id="purpose-2.Application" style="text-align:left">2.Application Manager and Developer Testing Overview</div>

<div data-id="explanation-of-test-levels-and-test-types" style="text-align:left">Explanation of Test Levels and Test Types</div>

<html><head></head><body><div data-id="third-party-software-development" style="text-align:left">Third <u class="defined-term">Party</u> Software Development</div></body></html>

<div data-id="amd-test-packs" style="text-align:left">AMD Test Packs</div>

<div data-id="elexon-test-packs" style="text-align:left">Elexon Test Packs</div>

<div data-id="what-testing-needs-to-be-carried-out" style="text-align:left">What Testing needs to be Carried Out?</div>

<div data-id="purpose-3" style="text-align:left">3. Business Process Operator Testing Overview</div>

<div data-id="explanation-of-test-types" style="text-align:left">Explanation of Test Types</div>

<div data-id="bpo-host-test-packs" style="text-align:left">BPO Host Test Packs</div>

<div data-id="purpose-4.Terms" style="text-align:left">4.Terms Used</div>

<div data-id="purpose-5.References" style="text-align:left">5.References</div>

<div data-id="purpose" style="text-align:left">Purpose</div>

<div data-id="completed-test-scripts" style="text-align:left">Completed Test Scripts</div>

<div data-id="supporting-test-evidence" style="text-align:left">Supporting Test Evidence</div>

<div data-id="need-more-information" style="text-align:left">Need more information?</div>

<div data-id="6" style="text-align:left">6.Appendix A – Test Results</div>

CONTENTS

Testing Guidelines V13.0

Defined Terms

Cross-references