Step 1 — Relevant industry  
VINCI is a diversified group with large concessions and transport infrastructure activities, notably toll roads and airports, plus construction/energy contracting businesses. Among the provided methodologies, the closest relevant framework is Transportation Infrastructure, where FFO-to-debt is the preferred core ratio. Because VINCI is not a pure transportation infrastructure concession company, I use the baseline S&P-style corporate adjustments with available reported data.

Step 2 — Estimate Adjusted EBITDA  
Start from operating profit and add depreciation/amortisation.

- Profit from operating activities: €6.489bn  
- Depreciation and amortisation: €3.613bn  

Reconstructed EBITDA:

\[
EBITDA = 6.489 + 3.613 = 10.102
\]

Nonrecurring operating income was a gain of €0.008bn, so subtract it for normalization:

\[
Adjusted\ EBITDA = 10.102 - 0.008 = 10.094
\]

Estimated Adjusted EBITDA = €10.094bn.

Step 3 — Estimate FFO  
Use:

\[
FFO = Adjusted\ EBITDA - cash\ interest - cash\ taxes
\]

Available cash flow data:

- Interest paid and received classified as operating activities: €0.563bn  
- Income taxes paid: €1.603bn  

\[
FFO = 10.094 - 0.563 - 1.603 = 7.928
\]

Estimated FFO = €7.928bn.

Step 4 — Estimate Adjusted Debt  
Reported financial debt components at 2022 year-end / 2023-01-01:

- Noncurrent bonds issued: €20.425bn  
- Other noncurrent borrowings: €3.205bn  
- Short-term borrowings: €6.368bn  
- Noncurrent lease liabilities: €1.580bn  
- Current lease liabilities: €0.522bn  

Reported debt including leases:

\[
Debt = 20.425 + 3.205 + 6.368 + 1.580 + 0.522 = 32.100
\]

Pension deficit / employee benefit provisions:

- Noncurrent provisions for employee benefits: €1.149bn  

Gross debt-like total:

\[
32.100 + 1.149 = 33.249
\]

Eligible cash:

- Cash and cash equivalents: €12.578bn  
- Current cash management financial assets: €0.755bn  

\[
Eligible\ cash = 12.578 + 0.755 = 13.333
\]

Adjusted debt:

\[
Adjusted\ Debt = 33.249 - 13.333 = 19.916
\]

Estimated Adjusted Debt = €19.916bn.

Step 5 — Calculate FFO / Adjusted Debt  

\[
FFO / Adjusted\ Debt = 7.928 / 19.916 = 0.3980739
\]

Rounded to four decimals:

<answer>0.3981</answer>