The lenses
Assumption Audit lens
Enterprise only
The Assumption Audit lens enumerates the structural assumptions implicit in the buyer's model and tests each one against the data. The output reads as an assumption ledger, with each entry marked supported, contradicted, or untested by the data on file.
What it answers
The lens answers which of the assumptions baked into the model are contradicted by the data. The answer is an assumption ledger with one row per assumption. Each row carries the assumption text, the test result, and the strength of the supporting or contradicting evidence.
When to run it
Run the Assumption Audit lens when a model has been in production long enough for assumption drift to accumulate, or when a model is being retired and the buyer needs a structured exit review. The lens is also used at model risk committee, where the buyer is asked to defend the assumptions on which the model rests.
Public-shaped output
The result page renders an Assumption Audit panel with one row per assumption. Each row carries the assumption label, the test result (supported, contradicted, or untested), and the evidence strength. A footer row reports the count of contradicted assumptions and the highest-impact contradiction.
Regulatory framing
The Assumption Audit lens is structured for review under SR 11-7, PRA SS1/23 Principle 3.4, EU AI Act Article 9 (high-risk per Annex III, applicable from August 2026), the ECB IM Guide, and APRA CPG 220. The framing is structured for review under, never satisfies, and never ready for submission to. The lens panel and any downloaded report carry the same locked attestation strip the rest of the report carries.
Tier gate
Enterprise tier only. The lens is the most compute-intensive in the catalogue and the only one available at a single tier.
| Tier | Unlocked |
|---|---|
| Free | |
| Growth | |
| Pro | |
| Business | |
| Enterprise | ✓ |
What buyers do with it
Buyers walk into a model risk committee with a structured assumption ledger rather than a narrative. The ledger is the artefact reviewers read, alongside the diagnosis report and any validation report. Contradicted assumptions are the buyer's queue for the next modelling cycle.