Define an organizational emissions inventory with controlled activity data, documented calculations, and a clear independent handoff.
Set the organizational and reporting boundary
Begin with the entities, sites, activities, reporting period, and consolidation approach. Identify emissions and removals relevant to the organization and disclose the method used to include or exclude sources. A boundary decision affects every later number.
ISO 14064-1 addresses organization-level quantification and reporting. If a customer, regulator, or disclosure regime prescribes additional categories or methods, record those requirements separately rather than assuming the ISO inventory alone satisfies them.
Document calculations and uncertainty
Map each source to an activity-data owner, system, emission factor, calculation method, and unit conversion. Keep factor versions and assumptions with the working file. Distinguish measured values from estimates and explain gaps or changes in method.
Set checks for completeness, duplicates, unusual movements, and reconciliation to operational or financial records. A reviewer should be able to follow a reported total back to the underlying records.
Control the cycle, not just the spreadsheet
Assign dates and approvals for data collection, calculation, review, and correction. Define when a structural change or material error requires recalculation. Supplier data deserves its own provenance and quality assessment.
Use the first reporting cycle to find fragile handoffs, then embed fixes in procurement, facilities, finance, and operations workflows. This reduces dependence on a single annual exercise.
Prepare the verification handoff
The inventory report should describe the boundary, period, methods, assumptions, exclusions, uncertainty, and changes from earlier periods. Package source evidence and review records in an index that an independent verifier can follow.
Normstone's implementation work can prepare the record. A separate competent validation or verification body makes any verification conclusion under the applicable programme.
Put it into practice
- Approve the organization and period boundary.
- Record source owners, methods, factor versions, and estimates.
- Test totals back to source records and investigate exceptions.
- Assemble the report and evidence index for independent verification.
Primary sources
- ISO: ISO 14064-1 organization-level GHG inventories
- GHG Protocol: Corporate Accounting and Reporting Standard
- ISO: ISO 14065 verification body requirements
Normstone resources are general information, not legal advice or an independent assessment.