// Carbon & Climate

GHG Inventory Development

Build a greenhouse gas inventory that can be reproduced, audited and improved year after year.

A complete organisational inventory with defined boundaries, documented sources, quality controls and a base year you can report against consistently.

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// Context

Why this matters

A greenhouse gas inventory is not a one-off calculation. It is a reporting asset that has to be produced again every year, on a comparable basis, often by different people than those who built it.

Inventories that were assembled quickly tend to fail on their second cycle. The spreadsheet is undocumented, the person who built it has moved on, the boundary has changed because the business acquired a site, and last year's figure can no longer be explained.

Building the inventory as a repeatable process -- with defined ownership, documented method and a recalculation policy -- costs more in the first year and considerably less in every year after it.

// The engagement

How CER helps

Boundary setting and consolidation approach
Full emissions source register across sites and activities
Activity data collection design, mapped to existing source systems
Emission factor library with documented sources and versions
Calculation model with built-in quality control checks
Base year determination and recalculation policy
Uncertainty and data quality assessment
Inventory management plan for repeat reporting cycles
Handover and internal training so the process can be run in-house

// Deliverables

What you receive

Organisational greenhouse gas inventory for the reporting period
Inventory management plan documenting process, ownership and controls
Emission factor library
Calculation model with quality control checks
Base year statement and recalculation policy
Data quality and uncertainty assessment
Internal handover session and process documentation

Frameworks and standards

GHG Protocol Corporate Standard
ISO 14064-1

// Fit

Who this is for

Organisations reporting emissions for the first time
Companies whose existing inventory cannot be reproduced or explained
Groups consolidating emissions across multiple entities or countries
Organisations preparing for limited assurance on Scope 1 and 2 data

// Why CER

Practitioners, not report writers

CER works from Singapore with organisations across Asia, which matters for this service because requirements arriving from European regulators, regional supervisors and local listing rules do not align neatly.

Engagements run through to implementation: the data collection process, the documentation, the controls and the internal handover, so that the second cycle is cheaper than the first and can be run without us.

Where an organisation would be better served by building the capability internally, CER Academy delivers the same technical material as training.

Meet the people behind the work

// Our people

Expertise on this service

Raymond Cheung

Advisor & Lead Trainer

Over twenty years in actuarial science and risk management, working across ESG, sustainability and ESG investment.

Actuarial science · Risk management · ESG and sustainability

View Raymond Cheung’s profile

// Questions

Frequently asked

What is an inventory management plan?

It is the written procedure for producing the inventory: who collects each data input, from which system, on what timetable, how it is checked, and how the result is reviewed. It is the document that lets a different person produce the same result next year.

How do we choose a base year?

A base year should be a period with reasonably complete data that is representative of normal operations. It also needs a recalculation policy, so that acquisitions, disposals or methodology changes are handled consistently rather than quietly resetting the baseline.

Can you work with our existing spreadsheet?

Usually. We review what exists, identify where the methodology or traceability breaks down, and rebuild those parts rather than discarding work that is sound.

Does this cover more than carbon dioxide?

Yes. An inventory covers the greenhouse gases relevant to your operations, converted to carbon dioxide equivalent using documented global warming potentials. Refrigerant losses in particular are commonly missed and can be material.

// Related