1.3 Calculations Assessment
No.	Question	Guidance	Response	Evidence
1	Data Request for Site Specific LLF re-calculations	If site specific LLFs were re-calculated, please provide the calculation details in Appendix 9.
2	Data Request for Generic LLF re-calculations	If generic LLFs were recalculated, Please provide a copy of the live model used to calculate your generic LLFs and the input data that supports Principle 9 of BSCP128. Where the data set is very large a subset of the data can be provided to demonstrate the year period used. A brief commentary should be included to explain why you believe the LLFs are an accurate reflection of the losses for the network at each voltage level. Where applicable, explain why use of Generic LLFs remains applicable instead of Site Specific LLFs if Principle 17 of BSCP128 applies
3	Please complete Appendix 5 for all Site Specific and Generic LLFs as detailed in question 1 and 2.	Appendix 5 contains two sub-documents CSAD 2.1 and CSAD 2.2. If site specific LLFs were re-calculated, please provide these details in CSAD2.1. If generic LLFs were re-calculated, please provide these details in CSAD2.2.
4	Have all changes or new SVA LLFC IDs been submitted into the Market Domain Data (MDD) change process (as per BSCP509)? If so please give details.	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).
5	Have all SVA LLFs been submitted in the D0265 file format?	The file format for SVA LLF submission is detailed in Appendix 7 of BSCP128.
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 6 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 6 of BSCP128.
7	Are the start dates for all re-calculated LLFs in line with the site go-live dates?	Please provide details on the LLF and site go-live dates.
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 in accordance with BSCP128. Please confirm that all LLFs are calculated to at least 3 d.p. in all files submitted.
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 LLFs that have significantly changed from the last submission of LLFs? If so, please provide details.	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. Evidence should include details of how this validation has been carried out and supporting rationale for the change in LLF Values.
9d	Are there any CVA LLFs that have significantly changed from the last submission of LLFs? If so, please provide details.	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 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. Evidence should include details of how this validation has been carried out and supporting rationale for the change in LLF Values.
10	Have the 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 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 in to their working instructions and/or process maps, including details on the error checking processes used in the calculation process.
12	Are there any SVA or CVA Site Specific sites for which a default calculation, or default replacement process was undertaken? If so, please give details.	SVA or CVA Site specific LLFCs for which a default calculation or default replacement was applied have to be documented and provided to the BSCCo auditor upon request. Any failure to do so will lead to a non- compliance. For example SVA or CVA sites where for a given SToD period instead of applying calculated LLF, a calculation was performed using a defined threshold (e.g. 200 kVA) or a generic LLF was applied.
13	Are there any Sites with multiple connections to the Total System where the primary connection is at EHV but there is a subordinate connection that Principle 17 (a)-(b) would apply to and for which a default calculation, or default replacement process was undertaken? If so, please give details.	Subordinate connections for which a default calculation or default replacement was applied have to be documented and provided to the BSCCo auditor upon request. Any failure to do so will lead to a non- compliance. For example connections where for a given SToD period instead of applying Site Specific LLF, a generic LLF was applied.
14	Does the calculation involve third parties? If so please provide details.	Where aspects of the calculation 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 Calculations can be added here or appended to the document.

CONTENTS

BSCP128 Appendix 10: Calculation Self-Assessment Document (CSAD) for mid-year LLF submissions V4.0