The scope of settlement for past allocations where calibration bias was found

The options

The order shown is not a ranking of preference.

1. Option 1

   Wholesale recalculation of past allocations

   Reopening the settlement for the entire target period using preserved data and published estimation rules reflects allocation errors of the time, but estimation disputes and return burdens on previously favored regions arise.

2. Option 2

   Maintain past settlements, correct going forward

   Protects investments and ledger stability that rely on existing settlements and modifies allocations only from new ones, but losses from past exclusion are not recovered in this settlement.

3. Option 3

   Separate settlement through a joint adjustment fund

   Does not claw back existing allocations and corrects past losses through separate review, but members unaffected by the error also bear costs and the size of adjustments is limited by shortfalls in the reserve fund.

The situation as it stands

If the settlement method is not settled, the reserve fund will be tied up in undetermined liabilities, delaying the next water supply facility contract, and the regions must budget without knowing the scale of returns or adjustments.

The inter-regional joint settlement network of the Yeoul Water Alliance, a fictional organization

1. Premise 1Synthetic scenario: The alliance discovered calibration bias in a particular flow range in the meter series used for past allocations. Some regions still have raw data that can be recalculated, but others retain only the final determinations, making it difficult to correct the same error in the same way.
2. Premise 2Synthetic constraint: The committee must decide the use of the existing settlement reserve fund within 90 days before the ledger closes. The definition of volume and the policy threshold of the time have not changed, and the uncertainty arising when past actual usage is estimated from new calibration results must be flagged separately.
3. Premise 3Synthetic conflict: Regions excluded from past additional allocation demand recalculation, while regions that received allocations demand settlement stability on the ground of facility investments they have already carried out. Regions that lost records argue that a scheme in which only regions with well-preserved data recover entrenches management gaps.

Where it holdsConfirm the settlement method to be applied to past additional water allocation records affected by calibration bias.

What can be lost

• Previously excluded regions: may lose the opportunity to recover the water they did not use and the resulting business losses.
• Previously favored regions: may be unable to raise maintenance costs if they must return allocation benefits already invested in facilities.
• Other member regions of the alliance: may lose their maintenance budgets and the predictability of their allocations through contributions to the adjustment fund or delays in settlement.

What is still unknown

1. Unknown 1Whether the calibration bias identified today ran in the same direction and magnitude under all past operating conditions is unknown.
2. Unknown 2How far the actual usage of regions without raw data can be estimated from remaining facility records is undetermined.
3. Unknown 3The effect of changing past settlement on facility maintenance by region and on willingness to remain in the alliance is unconfirmed.

Signals to decide again

• The independent calibration review panel reviews monthly the applicable range of adjustment formulas by past operating condition, and if that range changes, the settlement method is reconsidered.
• The alliance's grievance audit officer compares quarterly the estimation errors for regions without raw data and the reasons applications were rejected, and if the effect of record-preservation gaps is confirmed, the matter is reconsidered.
• The alliance's finance officer confirms monthly the reserve fund balance and overdue facility maintenance after the settlement, and if approved maintenance capacity is compromised, the matter is reconsidered.