FMAE Product Overview
Executive Summary
Key Takeaways
- ✓ FMAE is the underlying deterministic audit engine; the nine packaged products are fixed-scope engagements built on top of it.
- ✓ Each product harvests a budget line that already exists rather than creating a new spending category.
- ✓ {'The suite spans the model lifecycle': 'bid, financial close, ongoing credit review, statutory audit, and licensed delivery through advisory firms.'}
- ✓ Every product is fixed-scope and generated from the engine's coverage output, with the scope stated in writing before an engagement begins.
- ✓ Structural findings are always kept separate from commercial, tax, or accounting judgment, which remains a human responsibility.
Purpose¶
The Financial Model Audit Engine (FMAE) is a deterministic, rule-based engine that tests the structural integrity of Excel-based financial models: circular references, hardcoded values, broken links, formula inconsistencies, and related structural risks. FMAE itself is not sold as standalone software. It is the common technology beneath a fixed set of nine engagement products, each of which packages the engine's output for a specific job in institutional finance, at a specific point in a model's lifecycle.
Every product in the suite maps to a budget line that already exists in the market it serves: mandated model audit fees, pre-decision review spend, documentation engagement lines, annual credit and asset review budgets, statutory audit fees, and tender evaluation mandates. None of the nine products is a new category of spend; each converts an existing line item into a deterministic, provenance-stamped deliverable.
Who It Is For¶
The product suite serves the full set of parties who rely on a financial model to make a decision: lenders and sponsors on project finance and infrastructure transactions, investment committees and boards, procuring authorities and tender advisors, statutory audit firms, and second-tier advisory and model-build firms delivering structural verification under licence. Which product applies depends on the moment in the model's lifecycle, the decision being made, and who is paying for the check.
Problems Solved¶
- A lender, committee, or board needs a structural opinion on a model before a financial decision, but full manual audits are slow, expensive, and not independently reproducible.
- A model changes between a lender-mandated review and a financial close, or between one annual credit review and the next, and nobody has a deterministic way to say what changed and whether it matters.
- A model handed over at financial close, or handed off between teams, needs a verifiable reference version and structural documentation, not just a spreadsheet file.
- Advisory and model-build firms want to offer structural verification without building their own audit engine, and without compromising their independence by verifying their own work.
- Procuring authorities and statutory auditors need a consistent, defensible structural layer inside a process (a tender evaluation, an audit file) where the underlying commercial or accounting judgment stays with the human professional running that process.
Workflow¶
Every engagement in the suite starts from the same underlying mechanism: a financial model is run through FMAE, which applies its structural rule set and produces a set of findings together with a coverage statement describing what was and was not analysed. From that common base, each product applies a different scope, deliverable template, and delivery cadence:
- Ignite products convert an existing mandate into revenue and references now — the Independent Structural Model Review and the Committee Readiness Pack.
- Convert products turn a single engagement into a calendar or a recurring relationship — the Resubmission Diff Pack, Close Baseline Pack, Documentation & Handover Pack, and Annual Re-Verification Pack.
- Multiply products convert one delivery calendar into many — the Builder & Reviewer Licence, which licenses advisory and model-build firms to deliver co-branded verification on the platform.
- Compound products seed longer-term constituencies and the verified record itself — the Bid Model Evaluation Pack for procuring authorities, and the Audit Evidence Model Review for statutory auditors.
Outputs¶
Each product issues its own deliverable family, generated from the same underlying engine facts: an executive-panel structural review report, a condensed committee-facing panel, a version-to-version delta pack, a sealed baseline certificate, a generated documentation book, an annual drift report, co-branded firm deliverables, a multi-bidder comparability matrix, or an audit-file evidence pack. Every deliverable carries the same underlying discipline: findings are traceable to specific structural facts, coverage is stated explicitly, and the run that produced the deliverable is reproducible. The specific deliverable format for each product is described on its own page, linked below.
Continue Reading¶
Related Products¶
- Financial Model Audit Engine (FMAE)
- Independent Structural Model Review
- Committee Readiness Pack
- Resubmission Diff Pack
- Close Baseline Pack
- Documentation & Handover Pack
- Annual Re-Verification Pack
- Builder & Reviewer Licence
- Bid Model Evaluation Pack
- Audit Evidence Model Review
Related Pillars¶
Related Comparisons¶
How OXXON tests thisRun a free structural check with FMAE
Frequently Asked Questions
What is FMAE?
The Financial Model Audit Engine, a deterministic, rule-based engine that applies a fixed set of structural rules to an Excel financial model and produces reproducible findings about its structure.
What products are built on FMAE?
Nine engagement products, the Independent Structural Model Review, Committee Readiness Pack, Resubmission Diff Pack, Close Baseline Pack, Documentation & Handover Pack, Annual Re-Verification Pack, Builder & Reviewer Licence, Bid Model Evaluation Pack, and Audit Evidence Model Review, each described on its own page below.
Who uses Oxxon Advisors products?
Lenders and sponsors on project finance and infrastructure deals, investment committees, procuring authorities and tender advisors, statutory audit firms, and advisory and model-build firms delivering under licence.
Does Oxxon Advisors build financial models or assess assumptions?
No. The platform sells deterministic structural assurance with the scope stated in writing. Financial logic, valuation, tax, accounting, and assumption reasonableness remain human responsibilities and are permanently outside the product suite.
How do the nine products relate to each other?
Each does one of four jobs, converting an existing mandate into revenue and references, turning an engagement into a recurring relationship, multiplying delivery through licensed firms, or seeding a longer-term constituency such as tender authorities or audit firms.
Is FMAE sold as standalone software?
No. The engine is priced to convert clients into one of the nine engagement products and never appears as a standalone revenue line.
What is the difference between the Independent Structural Model Review and the Committee Readiness Pack?
The Review is the full lender-facing structural engagement; the Committee Readiness Pack is a lighter, faster version of the same underlying check, sized for an investment-committee reader.
Can advisory firms deliver Oxxon-verified reviews under their own brand?
Yes, through the Builder & Reviewer Licence, which produces co-branded deliverables combining Oxxon's structural layer with the licensed firm's own opinion layer. Full white-label delivery is not offered.
Related Articles
What Is a Financial Model Audit?
A financial model audit is an independent, structured examination of an Excel based financial model to confirm that its mechanics, logic, and outputs are reliable enough to support a decision. It is not a check of whether the assumptions are optimistic or conservative. It is a check of whether the model actually calculates what its author believes it calculates. Every year, lenders extend debt, investment committees approve capital, and boards sign off on transactions using numbers that came out of a spreadsheet nobody outside the immediate deal team has independently verified. A financial model audit exists to close that gap before it becomes expensive.
What Is Model Risk?
Model risk is the risk that a decision is wrong not because the underlying business or investment case was flawed, but because the model used to evaluate it was. It is a distinct category of risk from market risk, credit risk, or operational risk, and it applies to any organisation that relies on a financial model, spreadsheet or otherwise, to support a material decision. Most published model risk content addresses statistical and regulatory capital models used inside banks. This page defines model risk specifically as it applies to Excel based financial models, the kind used every day for investment decisions, lending, and transaction evaluation, which is a related but distinct problem from the quantitative model risk literature most search results return.
Deterministic Audit vs Generative AI Review
Not all AI applied to financial model audit works the same way. This page compares two genuinely different approaches: deterministic audit, a fixed, rule based methodology applied consistently to every formula, and generative AI review, a general purpose large language model reading a model and offering commentary. Both use AI in a loose sense. Only one produces the repeatable, explainable, evidence backed output typically required for a material financial decision.