Steve Nunnington

1
Mod 124

• Steve Nunnington

2
History of the 10 day rule

• 10 day rule covered in M 3.3.4
• System capacity of 400,000 meter reads per day as
  set out in UK Link manual.
• Problems in 2003.
• Meter read submissions start to increase rapidly.
• 3 days in August saw meter read submissions
  exceed 1 million mark.
• Caused massive problems as batch schedules
  overrun.
• Initially functionality introduced to reject
  files above the 400,000 figure.
• Eventually introduced changes to rollover meter
  read files.
• M 3.3.4 wasnt used prior to CTP Mods
• New Mods to introduce PP opening read estimates
  and AMR reads
• CTP Mods to introduced OSER and POS reads
• Increases potential number of reads which could
  be submitted

3
History of M 3.3.4

• Mod 693 introduced to restrict amount of meter
  reads which could be submitted per MRF.
• It was decided to invoke M 3.3.4 to protect UK
  Link and was communicated to the Workstream.
• Main issue is stockpiling of reads.
• Shipper issues identified following delivery of
  CTP Mods and subsequent implementation of 10 day
  rule.
• Shippers had historical meter reading backlogs.
• xoserve relaxed M 3.3.4 to 99 days for period of
  3 months
• March to June 2006.
• Involved agreed schedule of submission
• Rollover of meter read files daily with weekend
  catch up.
• Major issues encountered on UK Link
• Not sustainable in the long term
• In June 2006 M 3.3.4 re-instated.

4

Benefits of Mod 124

• Allows xoserve to receive more meter reads.
• Improves AQ values.
• Allows more reconciliation to take place.
• Helps with demand attribution.
• Makes Energy balancing more robust.
• Has benefits for shippers in terms of validation
  timescales.

5
The proposal

• xoserve systems cannot currently support a window
  of 20 days.
• Allows reads to be stockpiled and the 400,000
  limit exceeded.
• Examples before the Mods where in a single month
  meter read submissions exceeded 1 million per day
  on 3 occasions.
• Potentially could mean a perpetual rollover with
  no catch up.
• May affect Opening Read window due to rollover.
  An xoserve estimate could be issued when an
  actual read has been submitted.

6

The Way Forward

• xoserve systems can handle a window of 15 days
  and would propose this as a transitional measure.
• UK Link refresh will mean improved processing
  speeds.
• Potential to increase the 400,000 maximum.
• Move to 20 days post refresh. Initially on a
  trial basis.
• UK Link Refresh planned for November 2007.