I'll execute this workflow step-by-step to assess HERA S.P.A.'s credit trend from 2021 to 2022.

## Step 1: Identify the Relevant Industry

HERA S.P.A. is an Italian utility company (società per azioni) based in Bologna. The company operates in water, gas, and electricity distribution and supply services. Based on the annual report structure and business description mentioning revenue from utilities services, HERA S.P.A. is a **multi-utility (water, gas, electricity)** company.

This falls under the **Regulated Utilities** industry methodology provided in the S&P guidelines.

## Step 2: Estimate 2021 Adjusted_EBITDA

From the data provided, I need to reconstruct EBITDA for 2021:

**2021 Income Statement:**
- Profit Loss Before Tax: 406,900,000 EUR
- Finance Costs: 300,300,000 EUR
- Finance Income: (82,300,000) EUR
- Net Finance Costs: 218,000,000 EUR
- EBIT (Operating Profit): 406,900,000 - 218,000,000 = 188,900,000 EUR

Actually, the data shows:
- Profit Loss From Operating Activities 2021: 611,700,000 EUR (this is EBIT)
- Finance Income Cost 2021: (204,800,000) EUR
- Profit Loss Before Tax 2021: 406,900,000 EUR

EBIT = 611,700,000 EUR

**Add back:**
- Amortisation Depreciation And Provisions 2021: 612,100,000 EUR

**EBITDA (2021) = 611,700,000 + 612,100,000 = 1,223,800,000 EUR**

**Adjustments for Regulated Utilities:**
- Other Work Performed By Entity And Capitalised 2021: 60,800,000 EUR (capitalize internally; treat as normalization)
- The company operates as a regulated utility with stable regulatory framework

For regulated utilities, minimal normalization is typically needed beyond normal GAAP adjustments. The provided data shows:
- No material pension adjustments indicated
- No significant joint venture impacts beyond equity method

**Adjusted_EBITDA (2021) = 1,223,800,000 EUR** (using reported EBITDA with minimal adjustments given the regulated nature)

## Step 3: Estimate 2021 FFO

**FFO = Adjusted_EBITDA - cash_interest - cash_taxes**

From cash flow statement:
- Finance Costs Paid Classified As Operating Activities 2021: 96,200,000 EUR
- Income Taxes Paid Classified As Operating Activities 2021: 156,300,000 EUR

**FFO (2021) = 1,223,800,000 - 96,200,000 - 156,300,000 = 971,300,000 EUR**

## Step 4: Estimate 2021 Adjusted_Debt

From balance sheet as of 2022-01-01 (end of 2021):

**Debt Components:**
- Noncurrent Financial Liabilities (2022-01-01): 3,716,000,000 EUR
- Current Financial Liabilities (2022-01-01): 499,700,000 EUR
- Noncurrent Lease Liabilities (2022-01-01): 53,200,000 EUR
- Current Lease Liabilities (2022-01-01): 43,400,000 EUR

**Total Debt = 3,716,000,000 + 499,700,000 + 53,200,000 + 43,400,000 = 4,312,300,000 EUR**

**Less: Eligible Cash (2022-01-01):**
- Cash And Cash Equivalents (2022-01-01): 885,600,000 EUR

**Adjusted_Debt (2021) = 4,312,300,000 - 885,600,000 = 3,426,700,000 EUR**

## Step 5: Calculate 2021 Adjusted_Debt / Adjusted_EBITDA

**Leverage Ratio (2021) = 3,426,700,000 / 1,223,800,000 = 2.80x**

## Step 6: Calculate 2021 FFO / Adjusted_Debt

**Coverage Ratio (2021) = 971,300,000 / 3,426,700,000 = 0.283**

## Step 7: Estimate 2022 Adjusted_EBITDA

**2022 Income Statement:**
- Profit Loss From Operating Activities 2022: 533,800,000 EUR (EBIT)
- Amortisation Depreciation And Provisions 2022: 667,100,000 EUR

**EBITDA (2022) = 533,800,000 + 667,100,000 = 1,200,900,000 EUR**

**Adjusted_EBITDA (2022) = 1,200,900,000 EUR**

## Step 8: Estimate 2022 FFO

From cash flow statement:
- Finance Costs Paid Classified As Operating Activities 2022: 128,000,000 EUR
- Income Taxes Paid Classified As Operating Activities 2022: 165,900,000 EUR

**FFO (2022) = 1,200,900,000 - 128,000,000 - 165,900,000 = 907,000,000 EUR**

## Step 9: Estimate 2022 Adjusted_Debt

From balance sheet as of 2023-01-01 (end of 2022):

**Debt Components:**
- Noncurrent Financial Liabilities (2023-01-01): 5,689,900,000 EUR
- Current Financial Liabilities (2023-01-01): 650,100,000 EUR
- Noncurrent Lease Liabilities (2023-01-01): 55,100,000 EUR
- Current Lease Liabilities (2023-01-01): 21,300,000 EUR

**Total Debt = 5,689,900,000 + 650,100,000 + 55,100,000 + 21,300,000 = 6,416,400,000 EUR**

**Less: Eligible Cash (2023-01-01):**
- Cash And Cash Equivalents (2023-01-01): 1,942,400,000 EUR

**Adjusted_Debt (2022) = 6,416,400,000 - 1,942,400,000 = 4,474,000,000 EUR**

## Step 10: Calculate 2022 Adjusted_Debt / Adjusted_EBITDA

**Leverage Ratio (2022) = 4,474,000,000 / 1,200,900,000 = 3.73x**

## Step 11: Calculate 2022 FFO / Adjusted_Debt

**Coverage Ratio (2022) = 907,000,000 / 4,474,000,000 = 0.203**

## Step 12: Classify Credit Trend

**Signal 1: Leverage Change**
- 2021 Leverage: 2.80x
- 2022 Leverage: 3.73x
- Change: 3.73 - 2.80 = +0.93x

Since +0.93x ≥ +0.2x → **Deteriorating**

**Signal 2: Cash-flow Coverage Change**
- 2021 Coverage: 0.283
- 2022 Coverage: 0.203
- Change: 0.203 - 0.283 = -0.080

Since -0.080 ≤ -0.03 → **Deteriorating**

**Conclusion:**
Both signals agree and point to **Deteriorating** credit quality. The company experienced:
1. A significant increase in leverage of +0.93x (substantial deterioration, more than 4x the threshold)
2. A material decline in FFO/Debt coverage of -8.0 percentage points (almost 3x the deterioration threshold)

The deterioration reflects:
- EBITDA declining slightly from €1,223.8M to €1,200.9M (-1.9%)
- Adjusted debt increasing materially from €3,426.7M to €4,474.0M (+30.5%)
- FFO declining from €971.3M to €907.0M (-6.6%)

This substantial increase in leverage while cash flow coverage worsens indicates a clear deteriorating credit trend.

<answer>Deteriorating</answer>