cseps ndm reconciliation. assuming opening read of zero
TRANSCRIPT
No shipper transfer
Missing historic opening read
Actual read gained
X
Period A Period B
Assume read of zero
Can calculate consumption from zero to read X
Period A billed 100 units.
(Read X – opening read zero) shows 170 units used.
IGT submits revised volume 170 units.
Difference of 70 units reconciled for period A.
Shipper transfer – pro-rata by AQ
Missing historic opening read
Actual read gained
X
Period A Period B
Assume read of zero
Shipper transfer
Period C
Can calculate consumption from zero to read X
Need to pro-rata between two shippers
Period A billed 80 units; Period B billed 20 units.
(Read X – opening read zero) shows 170 units used in total across A and B.
Actual volume 170 units to be pro-rated by IGT, based on AQ values for periods.
IGT should submit revised volume of 170 units; 80:20 = 136 units for A and 34 units for B.
Shipper transfer – estimate transfer by AQ
Missing historic opening read Actual read gained
X
Period A Period B
Shipper transfer
Period C
Assume opening read of zero; use AQ to estimate read for date Y (giving neutral rec for period A).
Use estimate read Y and actual read X to reconcile period B (likely to give non-neutral rec).
Y
Period A billed 80 units; Period B billed 20 units.
Estimate read Y based on AQ (from opening read zero), revised volume for period A still 80 units.
IGT submits revised volume for period A of 80 units – neutral rec.
If (actual read X – assumed read zero) = 170 units, (actual read X – est read Y) gives 90 units.
IGT submits revised volume for period B of 90 units – difference of 70 units reconciled.
Assume read of zero
Shipper transfer – flat profile
Missing historic opening read
Actual read gained
X
Period A Period B
Assume read of zero
Shipper transfer
Period C
Can calculate consumption from zero to read X
Need to pro-rata between two shippers
Period A 70 days; Period B 30 days.
(Read X – opening read zero) shows 170 units used in total across A and B.
IGT pro-rata revised volume of 170 units 70:30 across periods A and B.
IGT submits revised volumes of 119 units for period A; 51 units for period B.
Not using opening read of zeroNot using opening read of zero
With reference to an agreed cut-off date YWith reference to an agreed cut-off date Y
Calculate an estimated read for agreed date Y, based on known read
Missing historic opening read
Actual read gained
X
Period A Period B
Agreed date
Period C
Work back from actual read X; use AQ to estimate read for date Y (giving neutral rec for period B).
Use AQ to estimate consumption for period A (giving neutral rec for period A).
Same net effect as full neutral rec up to latest read X.
Y
Estimate volume for full rec period up to first known read, where rec begins pre date Y
Missing historic opening read
Actual read gained
X
Period A Period B
As missing opening read is before agreed date Y, either
- Work back from actual read X and use the AQ to estimate missing opening read; or
- Use AQ to estimate overall consumption for period A
(Should result in same outcome – neutral rec.)
Agreed date
Y
Close out all rec periods up to agreed date Y, create new rec period from Y
Missing historic opening read
Actual read gained
X
Period A Period B
Agreed date
Period C
Period A closed out and not reconciled (equivalent of exact neutral rec).
To reconcile period B will require a start read for date Y.
Working back from actual read X, use AQ to estimate read for date Y (giving neutral rec for period B).
Same net effect as neutral rec up to latest read X, ie closing out full period.
Y