The objective of this document is to provide a complete specification of the user requirements that the ECVAA service must meet. For this purpose, the “users” include BSCCo Ltd, Ofgem, National Grid as the balancing mechanism operator, other Service Providers, BSC Parties, and the ECVAA Service Provider’s own operators.

28.0

<div data-id="1-1.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">1.1 Purpose</div>

<div data-id="1-1.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">1.2 Scope</div>

<div data-id="1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">1. Management Summary</div>

<div data-id="2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">2 Introduction</div>

<div data-id="3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">3 Scope of Specification</div>

<div data-id="4-4.1-4.1.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.1.1 <u class='defined-term'>ECVNA</u>A Approval</div>

<div data-id="4-4.1-4.1.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.1.2 MRVNAA Approval</div>

<div data-id="4-4.1-4.1.3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.1.3 Notification Collection</div>

<div data-id="4-4.1-4.1.4" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.1.4 Credit Checking</div>

<div data-id="4-4.1-4.1.5" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.1.5 Aggregation and reporting to SAA</div>

<div data-id="4-4.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.1 Summary of Business Requirements</div>

<div data-id="4-4.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.2 Service Context</div>

<div data-id="4-4.3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.3 User Requirements Source Documents</div>

<div data-id="4-4.4" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.4 Requirements Summary</div>

<div data-id="4-4.5" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.5 Numbering Scheme for Requirements Definitions</div>

<div data-id="4-4.6" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.6 Attributes of Individual Requirements</div>

<div data-id="4" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4 Business and <u class='defined-term'>System</u> Overview</div>

<div data-id="5-5.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.1 <u class='defined-term'>ECVAA</u>-F001: Process Registration Data</div>

<div data-id="5-5.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.2 <u class='defined-term'>ECVAA</u>-F002: Process Credit Limit Data</div>

<div data-id="5-5.3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.3 <u class='defined-term'>ECVAA</u>-F003: Process <u class='defined-term'>ECVNA</u>A</div>

<div data-id="5-5.4" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.4 <u class='defined-term'>ECVAA</u>-F004: Process <u class='defined-term'>MVRNA</u>A</div>

<div data-id="5-5.5" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.5 <u class='defined-term'>ECVAA</u>-F005: Process <u class='defined-term'>Energy Contract Volume Notification</u>s</div>

<div data-id="5-5.6" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.6 <u class='defined-term'>ECVAA</u>-F006: Process <u class='defined-term'>Metered Volume Reallocation Notification</u>s</div>

<div data-id="5-5.7" style="text-align:left">5.7 <u class='defined-term'>ECVAA</u>-F007: Perform Credit Check</div>

<div data-id="5-5.8" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.8 <u class='defined-term'>ECVAA</u>-F008: Aggregate <u class='defined-term'>Energy Contract Volume</u>s</div>

<div data-id="5-5.9" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.9 <u class='defined-term'>ECVAA</u>-F009: Process Exception Data</div>

<div data-id="5-5.10" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.10 <u class='defined-term'>ECVAA</u>-F010: Calculate <u class='defined-term'>Party</u> Indebtedness</div>

<div data-id="5-5.11" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.11 <u class='defined-term'>ECVAA</u>-F011: Process <u class='defined-term'>Credit Cover</u> Minimum Eligible Amount Request</div>

<div data-id="5-5.12" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.12 <u class='defined-term'>ECVAA</u>-F012: Process <u class='defined-term'>Volume Notification</u> Nullification</div>

<div data-id="5-5.13" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.13 <u class='defined-term'>ECVAA</u>-F013 Manage <u class='defined-term'>ECVAA System Failure</u> / Withdrawal</div>

<div data-id="5-5.14" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.14 <u class='defined-term'>ECVAA</u>-F014: Matching of submitted ECVNs</div>

<div data-id="5-5.15" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.15 <u class='defined-term'>ECVAA</u>-F015: Matching of submitted MVRNs</div>

<div data-id="5-5.16" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.16 Notes on Notification Processing and Reporting</div>

<div data-id="5-5.17" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.17 <u class='defined-term'>ECVAA</u>-F016: <u class='defined-term'>ECVAA</u> Web Service Common Functionality.</div>

<div data-id="5-5.18" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.18 <u class='defined-term'>ECVAA</u>-F017: <u class='defined-term'>ECVAA</u> Web Service – BSC <u class='defined-term'>Party</u> View ECVNs Functionality.</div>

<div data-id="5-5.19" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.19 <u class='defined-term'>ECVAA</u>-F018: <u class='defined-term'>ECVAA</u> Web Service – BSC <u class='defined-term'>Party</u> View MVRNs Functionality.</div>

<div data-id="5-5.20" style="text-align:left">5.20 <u class='defined-term'>ECVAA</u>-F019: <u class='defined-term'>ECVAA</u> Web Service - <u class='defined-term'>ECVNA</u> Functionality.</div>

<div data-id="5-5.21" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.21 <u class='defined-term'>ECVAA</u>-F020: <u class='defined-term'>ECVAA</u> Web Service - <u class='defined-term'>ECVNA</u> ECVN Submission Functionality.</div>

<div data-id="5-5.22" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.22 <u class='defined-term'>ECVAA</u>-F021: <u class='defined-term'>ECVAA</u> Web Service - <u class='defined-term'>MVRNA</u> Functionality.</div>

<div data-id="5-5.23" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.23 <u class='defined-term'>ECVAA</u>-F022: <u class='defined-term'>ECVAA</u> Web Service - <u class='defined-term'>MVRNA</u> MVRN Submission Functionality.</div>

<div data-id="5-5.24" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.24 <u class='defined-term'>ECVAA</u>-F023: Banning/Unbanning Individual User Access to the <u class='defined-term'>ECVAA</u> Web service Functionality</div>

<div data-id="5-5.25" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.25 <u class='defined-term'>ECVAA</u>-F024: Process <u class='defined-term'>Withdrawing Party</u> Authorisation and Notification Details</div>

<div data-id="5-5.26" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.26 <u class='defined-term'>ECVAA</u>-F025: Calculate Period Final <u class='defined-term'>Physical Notification</u> Volumes</div>

<div data-id="5-5.27" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.27 <u class='defined-term'>ECVAA</u>-F026: Process removal of ECVNs / MVRNs from <u class='defined-term'>ECVAA</u> for a <u class='defined-term'>Party</u> in Section H <u class='defined-term'>Default</u></div>

<div data-id="5-5.28" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.28 <u class='defined-term'>ECVAA</u>-F027: Process <u class='defined-term'>Wholesale Market Activity Notification</u>s</div>

<div data-id="5" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5 Functional Requirements</div>

<div data-id="6" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">6 Interfaces Requirements</div>

<div data-id="7-7.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">7.1 <u class='defined-term'>ECVAA</u>-N001: Web Security Requirements</div>

<div data-id="7" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">7 Non-Functional Requirement</div>

<div data-id="8-8.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">8.1 <u class='defined-term'>ECVAA</u>-S001: Service Availability</div>

<div data-id="8-8.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">8.2 <u class='defined-term'>ECVAA</u>-S002: Volumetric Requirements</div>

<div data-id="8-8.3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">8.3 <u class='defined-term'>ECVAA</u>-S003: Resilience Requirements</div>

<div data-id="8" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">8 Service Requirements</div>

<div data-id="9" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">9 User Roles and Activities</div>

<div data-id="10" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">10 Future Enhancements</div>

<div data-id="appendix-a-glossary" style="text-align:left">Appendix A Glossary</div>

<div data-id="appendix-b-requirements-compliance-matrix" style="text-align:left">Appendix B Requirements Compliance Matrix</div>

<div data-id="appendix-c-not-used" style="text-align:left">Appendix C Not used</div>

<div data-id="appendix-d-business-process-model" style="text-align:left">Appendix D Business Process Model</div>

CONTENTS

Energy Contract Volume Aggregation Agent V28.0