How can a generated utility scenario represent a correction across a tariff change?

A billing analyst reviews dispute CASE-0412 for account ACC-2187. Bill BIL-6038 used an estimated meter reading. A later validated reading shows lower total consumption, but the billing interval crosses a tariff change recorded in schedule TAR-3091.

The analyst cannot apply the current tariff to the entire difference. The environment supplies the two tariff periods and a policy for allocating consumption when an exact boundary reading is unavailable. The agent must use that policy to propose revised usage and charges.

A billing supervisor approves adjustment ADJ-4472 after reviewing both the consumption allocation and the calculation. Posting preserves the original bill, creates the correcting entry and changes the account balance. The customer statement now explains the reduction using the applicable tariff periods.

A generated scenario can include the meter history, tariff schedule, allocation policy and approval state. It teaches that a monetary correction may depend on reconstructing an operational quantity first. The environment should keep those two decisions inspectable rather than collapsing them into a single replacement amount.