Building and Verifying a GHG Inventory

What is a GHG Inventory?

A GHG Inventory in SusDevOS is a formal, versioned record that groups all emissions data for a single reporting year. Once an inventory reaches Verified status, it becomes immutable — no edits are allowed without creating a new version.

Step 1: Create the Inventory

1. Navigate to Emissions → Inventories → New Inventory.
2. Fill in:
   • Reporting Year — the calendar or fiscal year (e.g. 2024).
   • Base Year — the baseline year used for target-setting. Usually the first year with complete data.
   • Consolidation Approach — must match your entity setting: Equity Share, Financial Control, or Operational Control.
   • Boundary Notes — describe inclusions and exclusions (e.g. "UK operations only; excludes leased vehicles below 3.5t").
3. Click Create. The inventory is created with VerificationStatus = 0 (Draft).

Step 2: Add Emissions Records

With the inventory open, records created in the same reporting period are automatically associated with it. You can also manually link a record to an inventory from the record's detail view.

Work through each scope:

• Scope 1 — direct combustion, vehicles, refrigerants. See the Emissions Recording guide.
• Scope 2 — purchased electricity (both methods). See the Scope 2 guide.
• Scope 3 — value chain categories relevant to your organisation. Document your relevance assessment (required for GHG Protocol conformance).

Step 3: Review Totals

The inventory overview shows:

• Scope 1, 2 (location and market-based), and 3 totals in tCO₂e
• Per-category breakdown for Scope 3
• Biogenic CO₂ (separately, not in GWP total)
• Data completeness indicator

Step 4: Internal Review and Approval

Move the inventory through the verification workflow:

To advance the status: open the inventory and click Submit for Review, then Approve, then Mark Verified (requires Manager or Admin role). Each state change is logged with the user's identity and timestamp.

Important: Once VerificationStatus ≥ 3, the API rejects any edit to the inventory or its associated records with HTTP 403. This is intentional and cannot be overridden.

Step 5: Generate the PDF Report

1. Open the verified inventory.
2. Click Generate Report → PDF.
3. SusDevOS produces a report containing:
   • Reporting entity, year, and boundary
   • Consolidation approach and boundary notes
   • Emission factor sources and GWP dataset used
   • Scope 1, 2, and 3 totals with subcategory breakdown
   • Biogenic CO₂ disclosure
   • Data quality assessment

Reports are stored in Reports → My Reports and available for download at any time.

Bulk Import

To import many records at once: Emissions → Records → Import. Download the Excel template, fill in activity data, and upload. Validation errors are reported row-by-row before any data is committed.