Proving Parity on Regulated Financial Reporting Before Cutover
A bank migrating its risk and finance reporting cannot cut over until an internal audit function accepts that migrated figures are identical to the source.
Run on Setu · Legacy-to-Modern BI
The challenge
Any variance between source and migrated output, however small, blocks sign-off entirely.
Rounding, null handling, and date-boundary behaviour differ subtly between the source and target platforms.
Audit needs documented evidence per report, not a summary assurance that migration succeeded.
How Setu solves it
Deterministic Replay
Source and migrated reports are executed against the same frozen dataset so any difference is attributable to the migration, not to data movement.
Value-Level Comparison
Output is compared cell by cell rather than by summary statistic, so silent variance cannot pass.
Variance Classification
Differences are classified as rounding, null-handling, or genuine logic divergence, and only the last requires engineering work.
Evidence Pack Generation
Each report produces a documented parity record suitable for the audit file.
Gated Cutover
A report cuts over only once its parity record is accepted.
The outcome
Parity evidenced per report rather than asserted across the programme.
Audit sign-off obtained on documented comparison rather than on assurance.
Cutover gated on evidence, so no report moved before it was proven.
Representative scenario: a modelled industry situation showing how this accelerator applies. Figures are projections, not a named client result.
Capabilities used
Every accelerator is assembled from the same capability layer, so a workflow you adopt here shares its foundation with the rest of the portfolio.
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