1.3 LLF Calculations/Processing Assessment
No.	Question	Guidance	Response	Evidence
1a	Please provide details of the calculation method for Site Specific LLFs.	Please give a description of the calculation method used. This should include a reference to the location in the methodology statement. The LDSO may wish to include an illustrative example as evidence. If you have no Site Specific LLFs please indicate as N/A.
1b	Please provide details of the process steps for your calculation of Site Specific LLFs.	Please give a description of the end to end process for calculating Site Specific LLFs. The LDSO may wish to include high level flow diagram of the process or internal working instructions that detail the process. If you have no Site specific LLFs please indicate as N/A.
2a	Please provide details of how you have obtained the Host LDSO’s Generic LLFs. Split by Host LDSO and identify which GSP Group (s) the LLFs are applicable for.	Please give a description of the method used to obtain the Host LDSO’s Generic LLFs. This should include a reference to the location on either the BSC Website or how obtained from the Host LDSO’s website if applicable. Split by GSP Group and Host LDSO
2b	Please provide details of the process steps for your manipulation of a Host LDSO’s Generic LLFs. If different by Host LDSO please give specific details.	Please give a description of the end to end process for the manipulation of the Host LDSO LLFs so as to construct you Generic LLFs submission by GSP Group. LDSO may wish to include high level flow diagram of the process or internal working instructions that detail the process.
3	Please complete the table of information for all Site Specific and Generic LLFs as detailed in section 2.	Data can be submitted in Excel file format with your CSAD submission. Section 2 is for supporting information for Site Specific and Generic data information submission. This information is used to aid the validation of the LLF data submission. LDSOs may choose to submit the information in Excel format as an attachment to the CSAD.
4	Have all changes or new SVA LLFC IDs been submitted into the Market Domain Data (MDD) change process (as per BSCP509) for non-migrated metering systems? If so please give details. Have all changes, or new SVA DUoS Tariff IDs or LLF IDs, been submitted into the Industry Standing Data(ISD) change process (as per BSCP707) for migrated metering systems? If so, please give details.	For non-migrated metering systems, any changes or new LLFC IDs must be submitted through the MDD change process. The correct LLFC Ids (and supporting information) are required to be approved in MDD prior to submission of the SVA LLFs. LDSOs should confirm that the MDD Change Request Form(s) (with CR References) have been submitted (see BSCP509 for further details). For migrated metering systems, any changes, or new DUoS Tariff IDs and/or LLF IDs, must be submitted through the ISD change process. The correct DUoS Tariff IDs and/or LLF IDs (and supporting information) are required to be approved in ISD prior to submission of the SVA LLFs. LDSOs should confirm that the ISD Change Request Form(s) (with CR References) have been submitted (see BSCP707 for further details). The ISD solution provides self-serve functionality for Embedded LDSOs that Mirror to submit an ISD CR with new DUoS Tariff IDs and/or LLF IDs.
5	Have all SVA LLFs been submitted in the required Appendix 7 file formats?	The file format for SVA LLF submission is detailed in Appendix 7 of BSCP128. The ISD file format for SVA LLF submission is defined in Appendix 7 of BSCP128. The ISD LLF solution provides self-serve functionality for Embedded LDSOs that Mirror to upload the LLF submission. Errors generated from the system validation will be reported to the LDSO and BSCCo. LDSOs shall review report and resubmit the LLF submission, as required.
6	Have CVA LLFs been submitted in the specified long or short file format?	The file format for CVA LLF submission is detailed in Appendix 5 of BSCP128. There are two formats that can be used, a long format detailing every Settlement Day and Settlement Period LLF and a short format detailing the LLF to be used for specified date ranges. The file requires a checksum, further information on calculating the checksum is detailed in section Appendix 5 of BSCP128. If CVA LLFs please indicate as N/A.
7	Are all LLFs submitted for start date 01 April (and start Settlement Period 1)? If not please give details,	The annual submission of LLFs covers the period 01 April to 31 March. Confirmation is required that all LLFs in the submission start from Settlement Period 1 on 01 April. Evidence will detail how this had been checked.
8	Are all LLFs calculated to at least 3 decimal places (d.p.) and submitted to 3 decimal places?	LLFs are required to be calculated to three decimal places. Please confirm that all LLFs are calculated to at least 3 d.p. in all files submitted. Evidence should include details of how this validation has been carried out.
9a	Are all SVA LLFs ≥ 0.750 and ≤1.250?	Please confirm that all SVA LLFs are calculated within the range specified. Evidence should include details of how this validation has been carried out.
9b	Are all CVA LLFs ≥0.750 and ≤1.250?	Please confirm that all CVA LLFs are calculated within the range specified. Evidence should include details of how this validation has been carried out.
9c	Are there any SVA Site Specific LLFs that have significantly changed from the last submission of LLFs? BSCCo would expect evidence to be provided for all LLFs which are expected to breach this tolerance.	BSCCo will be validating the SVA submission in accordance with BSCP128 Section 3.5 point 7 c). BSCCo will identify any LLF values that are outside of the range specified. BSCCo will request from the LDSO evidence for any values that fall outside of this range and supporting rationale to justify this change.
9d	Are there any CVA LLFs that have significantly changed from the last submission of LLFs? BSCCo would expect evidence to be provided for all LLFs which are expected to breach this tolerance.	BSCCo will be validating the CVA submission in accordance with BSCP128 Section 3.5 point 7 d). BSCCo will identify any LLF values that are outside of the range specified. BSCCo will request from the LDSO evidence for any values that fall outside of this range and supporting rationale to justify this change.
9e	Are there any new Site Specific sites that were not included in last year’s submission? If so, please give details.	Please provide information in 2.1 for any new Site Specific sites. If you have no Site Specific sites please indicate as N/A.
10	Have any sites undergone a Relevant Change? If so please provide details.	Relevant Changes are defined in BSCP128 as ‘A significant change to the physical plant, apparatus, distribution network, or capacity which causes a change to the Line Loss Factors’. Information and supporting evidence should be detailed in the response. MSIDs should be flagged with the relevant information as in 2.1.
11	Please provide details of the error checking processes carried out when calculating/ manipulating LLFs.	LDSOs are required to have robust error detection and correction processes in place throughout the calculation of LLFs. LDSOs may wish to provide references to their working instructions and/or process maps, including details on the error checking processes used in the calculation/manipulation process.
12	Have all Site Specific LLFs been calculated within the last 5 years? Yes/No (delete as appropriate)	Site Specific LLFs must be calculated at least every 5 years. The cut off for the 5 year period is 30 September. Any failure to do so will lead to a non- compliance. For example, the annual LLFs for 1 April 2011, with calculations submission date of 1 October 2010, any Site Specific LLFs calculated up to up to and including 30 September 2005 must have been re-calculated. If you have no Site specific LLFs please indicate as N/A.
13	Have all Generic LLFs been calculated within the last 2 years? Yes/No delete as appropriate)	Generic LLFs must be calculated at least every 2 years. The cut off for the 2 year period is 30 September. Any failure to do so will lead to a non- compliance. For example, the annual LLFs for 1 April 2011, with calculations submission date of 1 October 2010, any LLFs calculated up to 30 September 2008 must be re-calculated.
14	Does the calculation/manipulation involve third parties? If so please provide details	Where aspects of the calculation/manipulation are sub-contracted to a third Party the activity should be detailed in the response field (description of process, process maps, quality checks, etc). The LDSO is still responsible for any elements that it has contracted out. For example, a LDSO may utilise a third Party to generate the Site Specific LLFs for a particular site.
15	Is there any additional detail you would like to add to your response?	Additional information that supports the audit of the process can be added here or appended to the document.

CONTENTS

BSCP128 Appendix 4 Line Loss Factor Calculation Self Assessment document (CSAD) for embedded LDSO that Mirror V5.0

Defined Terms

Cross-references