Acceptance	Has the meaning given to that term in Annex X-1 of the BSC.
Additional BM Unit	Has the meaning given to that term in Annex X-1 of the BSC.
AMSID Baseline Value	Has the meaning given to that term in Annex S-2 of the BSC.
AMSID Pair	Has the meaning given to that term in Annex X-1 of the BSC.
Asset Differencing	Has the meaning given to that term in Annex X-1 of the BSC.
Asset Metering Virtual Lead Party	A Virtual Lead Party (VLP) who has Qualified (in accordance with BSCP537) to register Asset Metering Systems and allocate AMSID Pairs to Secondary BM Units.
Balancing Service	Has the meaning given to that term in the ESO Licence.
Baseline Value	An MSID Baseline Value, AMSID Baseline Value or Net Differencing Baseline Value.
Baselined AMSID Pair	Has the meaning given to that term in Annex X-1 of the BSC.
Baselined BM Unit	Has the meaning given to that term in Annex X-1 of the BSC.
Baselined Entity	A Metering System or Metering System(s) for which paragraph 7.3.1 of BSC Annex S-2 requires Baseline Values to be calculated. A Baselined Entity may be either: An MSID Pair; An AMSID Pair; or A set of SVA Metering Systems and Asset Metering Systems that are related to each other for purposes of Asset Differencing.
Baselined Entity Metered Volume	In relation to a Baselined Entity to which Approved Baselining Methodology BL01 applies, the net Import of the Baselined Entity (in a hiSTORical Settlement Period), calculated in accordance with section 3.4.2 of this Baselining Methodology Document.
Baselined MSID Pair	Has the meaning given to that term in Annex X-1 of the BSC.
Baselining Methodology	Has the meaning given to that term in Annex X-1 of the BSC.
Baselining Methodology Document	Has the meaning given to that term in Annex X-1 of the BSC.
BSC Auditor	Has the meaning given to that term in Annex X-1 of the BSC.
BSCCo	Has the meaning given to that term in Annex X-1 of the BSC.
Eligible Day	An historical Settlement Day which meets certain criteria allowing data from that day to be used in the calculation of MSID Baseline Values. For Approved Baselining Methodology BL01, the criteria for a Settlement Day to be an Eligible Day are defined in section 3.4.1 of this Baselining Methodology Document.
Event Day	A Settlement Day affected by any of the circumstances listed in Appendix A of this Baselining Methodology Document, about which the Lead Party has notified SVAA in accordance with BSC Procedure BSCP602.
Gate Closure	Has the meaning given to that term in Annex X-1 of the BSC.
Inactive AMSID Pair	Has the meaning given to that term in Annex X-1 of the BSC.
Inactive MSID Pair	Has the meaning given to that term in Annex X-1 of the BSC.
In Day Adjustment	An additive adjustment to the baseline, used to adjust its level to more closely match outturn demand on the given Settlement Day. For Approved Baselining Methodology BL01, the calculation of the In Day Adjustment is defined in section 3.4.3 of this Baselining Methodology Document.
In Day Reference WINDOw	A period immediately prior to despatch of a BM Unit, used to calculate an In Day Adjustment for each Baselined Entity within that BM Unit. For Approved Baselining Methodology BL01, the In Day Reference Window is three hours long, as defined in section 3.4.3 of this Baselining Methodology Document.
MSID Baseline Value	Has the meaning given to that term in Annex S-2 of the BSC.
MSID Pair	Has the meaning given to that term in Annex X-1 of the BSC.
Net Differencing Baseline Value	Has the meaning given to that term in Annex S-2 of the BSC.
Non-Working Day	A Settlement Day that is not a Working Day.
Participant Management Platform	An IT System established by Elexon that (among other functions) allows the SVAA to record notifications of MSID Pairs submitted by Suppliers and Virtual Lead Parties.
Secondary BM Unit	Has the meaning given to that term in Annex X-1 of the BSC.
Settlement Day	Has the meaning given to that term in Annex X-1 of the BSC.
Settlement Period	Has the meaning given to that term in Annex X-2 of the BSC.
Technical Assurance Agent	Has the meaning given to that term in Annex X-1 of the BSC.
Unadjusted Baseline Value	In relation to a Baselined Entity to which Approved Baselining Methodology BL01 applies, the baseline value calculated by SVAA, prior to applying the In Day Adjustment. This is an intermediate data item within the BL01 methodology, calculated in accordance with section 3.4.2 of this Baselining Methodology Document.
Virtual Lead Party	Has the meaning given to that term in Annex X-1 of the BSC.
Working Day	Has the meaning given to that term in Annex X-1 of the BSC.

CONTENTS

Baselining Methodology Document V2.0

Defined Terms

Cross-references