A corporate GHG inventory needs a documented organizational boundary, complete Scope 1 and 2 sources, a justified approach to relevant Scope 3 categories, controlled activity data and emission factors, and a reproducible review trail.
The first goal is a reliable management baseline; precision should improve over time without hiding material uncertainty.
Who should use this guide, and what decision does it support?
Egyptian corporate sustainability, finance, energy, procurement and assurance teams preparing emissions information.
Before work begins, agree the question the assessment or review must answer and who will rely on the result. A design decision, lender report and regulatory submission need different levels of detail. Defining the use case early prevents teams from collecting large amounts of information that do not change the decision.
A practical implementation sequence
- Set the reporting purpose, period, entities and consolidation approach.
Set the purpose, boundary and decision timetable in writing. Name the people who will supply information and approve the result, and record any legal, lender or client framework that changes the scope.
- Map emission sources and responsible data owners.
Build a source register before analysis begins. Check dates, units, ownership and completeness so later calculations and findings use consistent information rather than convenient but incompatible files.
- Collect activity data with units, periods and supporting records.
Test important claims against more than one form of evidence where practical. Site observation, interviews, measurements and operating records often reveal whether a documented control is actually used.
- Apply controlled factors and calculation methods.
Evaluate significance against the agreed decision criteria and show assumptions or sensitivity clearly. Separate observed facts, calculations, professional judgement and information that remains unavailable.
- Review completeness, uncertainty, changes and base-year implications.
Turn the result into an implementable output. Assign owners, deadlines, resources, monitoring indicators and objective closure evidence, then retain the approved version for future review.
Data and evidence required
The conclusion becomes more reliable when boundaries, data sources, responsibilities and quality checks are documented from the start. Possessing a file is not enough: record its period, unit, owner, review method and any adjustment made.
- Fuel and refrigerant records
- Purchased electricity and meter data
- Fleet and process information
- Procurement, logistics, travel and waste data
- Factor sources, calculations and approvals
Maintain a simple evidence register that connects each finding to its source, identifies unavailable information and explains how uncertainty was handled. This reduces review time and makes the conclusion easier to update when design, operations or requirements change.
How management should use the result
A decision-ready output distinguishes issues that prevent a decision, actions that must close before a defined milestone and improvements that can be managed through operations. Every action should have an owner, date, resources and objective closure criterion instead of a general instruction to “comply with requirements”.
Put a short executive answer first, with the analysis and evidence underneath. Management, finance, legal and technical readers can then use the level they need while the full reasoning remains traceable and reviewable.
Common mistakes to avoid
- Mixing operational and equity boundaries
- Using spend data when better activity data exists without explanation
- Changing factors or structure with no recalculation policy
- Reporting a total with no uncertainty or completeness view
A recurring mistake is to confuse a completed report with effective implementation. Quality is demonstrated when the output informs a decision, changes a control or closes a gap with evidence—not by page count or table density.
Frequently asked practical questions
When should the work begin?
Start before design freeze, financing approval or a submission deadline. Early work gives teams time to resolve missing data and change options at lower cost.
Is a document review sufficient?
Not for most material assignments. Documents show the intended system; interviews, site observation and operating records test whether controls work in practice.
How should incomplete data be handled?
Record the gap and its effect, use a conservative estimate where justified and define how better data will be obtained. Do not hide uncertainty inside a final number that appears more precise than the evidence supports.
What makes an output reviewable?
Clear boundaries, traceable sources, retained versions, disclosed assumptions, internal review and an identified approval owner.
Checklist before sign-off
- Boundary and exclusions are transparent
- Scope 1 and 2 sources reconcile to operations
- Scope 3 screening is documented
- Units and factors are version-controlled
- Management review and sign-off are recorded
This checklist does not replace project-specific legal or contractual advice. Confirm the applicable framework for every assignment and obtain appropriate advice where exposure is material.