Product life-cycle greenhouse gas emissions per unit of analysis
Measurement answer
What this metric measures
Total product life-cycle greenhouse gas emissions reported as carbon dioxide equivalent per unit of analysis for the defined product inventory boundary.
Specification
Metric specification
- Result format
- Single value
- Unit
- CO2e per unit of analysis — source-defined reporting unit
- Reporting basis
- Inventory period disclosed for the product inventory
- Aggregation
- Total greenhouse gas emissions across the reported product life-cycle inventory boundary, expressed in carbon dioxide equivalent per unit of analysis
- Pillar
- Environmental
- Topic
- Product life-cycle greenhouse gas inventory
- Controlled domain
- Products and life-cycle assessment
- Entity type
- Metric
Reporting boundary
Defined product life-cycle inventory boundary; boundary type and included life-cycle stages must be disclosed
Verified source occurrences
Framework coverage
This is one canonical metric. The bindings below show every verified framework occurrence without creating duplicate metric pages. Edition, disclosure, role, and relationship remain source-specific.
- Adopting Disclosureproduct-life-cycle-ghg-emissions-co2e-per-unit-of-analysis
CDP Full Corporate Questionnaire 2026
- Publisher
- CDP
- Edition
- Full Corporate Questionnaire and Reporting Guidance 2026 v1.3, revised 6 August 2026
- Requirement
- Conditional
- Relationship
- Reuses Canonical Metric
- Mapping outcome
- Reused
- Source locator
- Q7.73.2, numeric field 1 | Q7.73.2, numeric field 2
- Measurement AuthoritySource evidence
GHG Protocol
- Publisher
- GHG Protocol
- Edition
- September 2011 publication
- Requirement
- Not Specified
- Relationship
- Defines Measurement
- Mapping outcome
- Direct Evidence
- Source locator
- Chapter 7, page 47
- Measurement Authority71b3d5f7ab4959d4b702
GHG Protocol
- Publisher
- GHG Protocol
- Edition
- September 2011 publication
- Requirement
- Not Specified
- Relationship
- Maps Source Identity
- Mapping outcome
- Published
- Source locator
- Chapter 7, page 47
- Measurement AuthorityCarbonFootprint.pcfExcludingBiogenicUptake
PACT Product Carbon Footprint Methodology
- Publisher
- WBCSD / Partnership for Carbon Transparency
- Edition
- PACT Methodology 3.0.1 and Technical Specifications 3.0.3
- Requirement
- Mandatory
- Relationship
- Reuses Canonical Metric
- Mapping outcome
- Reused
- Source locator
- Technical Specifications 3.0.3, Section 4.7, CarbonFootprint.pcfExcludingBiogenicUptake
- Measurement AuthorityCarbonFootprint.pcfIncludingBiogenicUptake
PACT Product Carbon Footprint Methodology
- Publisher
- WBCSD / Partnership for Carbon Transparency
- Edition
- PACT Methodology 3.0.1 and Technical Specifications 3.0.3
- Requirement
- Mandatory
- Relationship
- Reuses Canonical Metric
- Mapping outcome
- Reused
- Source locator
- Technical Specifications 3.0.3, Section 4.7, CarbonFootprint.pcfIncludingBiogenicUptake
Value structure
Dimensions and units
- Unit
- CO2e per unit of analysis — source-defined reporting unit
- Reporting basis
- Inventory period disclosed for the product inventory
Unit meaning: Values use CO2e per unit of analysis under the disclosed GHG Protocol Product Standard method, product boundary and reporting period.
Published dimensions
- product
- unit of analysis
- functional unit or reference flow
- life-cycle stage
- boundary type
- greenhouse gas
- biogenic status
- direction of emission or removal
- inventory period
- GWP source and date
- allocation method
- recycling method
- land-use-change method
Calculation method
Formula information
- Status
- Specified
- Formula type
- Sum
Formula
Total product life-cycle GHG emissions per unit of analysis = Σ(quantified greenhouse gas contributions within the defined product life-cycle inventory boundary, converted to CO2e using the disclosed GWP source) / unit of analysis.Apply the source-defined GHG Protocol Product Standard method only within the disclosed product, unit-of-analysis and life-cycle boundary. Publish because the Product Standard explicitly requires total greenhouse gas emissions to be reported in CO2 equivalents per unit of analysis. This is the standalone net product inventory outcome, with boundary, stage, gas, biogenic-status, GWP, allocation, recycling, and land-use-change variants retained as dimensions or required method disclosures rather than collapsed into a corporate emissions metric.
Variables
| Symbol | Variable | Definition | Unit |
|---|---|---|---|
i | Inventory contribution | A quantified greenhouse gas emission or removal contribution included within the defined product life-cycle inventory boundary. | mass of gas or CO2e |
GWPi | Global warming potential factor | The disclosed characterization factor used to convert greenhouse gas i to carbon dioxide equivalent. | CO2e per mass of gas |
U | Unit of analysis | The declared unit to which the product life-cycle inventory result is normalized. | unit of analysis |
Verified sources
Evidence and status sources
Sustopedia checked each record-specific claim directly against primary publisher material. Labels distinguish current measurement authority from future compatibility and corroborative, legal, edition, or method status context. Corroborative evidence can support a stated limitation but cannot establish the core measurement by itself.
Measurement evidence
- Measurement evidenceChecked 28 August 2026
Product Life Cycle Accounting and Reporting Standard
- Publisher
- GHG Protocol
- Edition
- September 2011 publication
- Locator
- Chapter 7, page 47
Supports: The official GHG Protocol Product Standard source supports the identity, boundary and method basis of “Product life-cycle greenhouse gas emissions per unit of analysis”.
Open official source
Use with context
Interpretation boundaries
Method disclosures required
Source-edition basis: Product Life Cycle Accounting and Reporting Standard, September 2011 publication.
- Product and the unit of analysis, including the applicable functional unit or reference flow.
- Product life-cycle boundary type and included life-cycle stages.
- Inventory period and the greenhouse gases included, including nitrogen trifluoride under the February 2013 Required Gases amendment.
- GWP source and publication date used to convert gases to CO2e.
- Treatment of biogenic emissions and removals, including separate biogenic and non-biogenic profiles where applicable.
- Allocation and recycling methods applied.
- Land-use-change method and any direct land-use-change impacts reported.
- Any exclusions, data limitations, and treatment of removals.
Record-specific limitations
- The result is an attributional product inventory result and must not be netted with offsets, avoided emissions, delayed-emission weighting, indirect land-use-change impacts, or indirect market effects.
- Supplementary end-of-life information must remain distinct from the reported total product life-cycle GHG emissions result.
- Interpretability depends on disclosed inventory boundary, unit of analysis, GWP factors, allocation choices, recycling treatment, data sources, and land-use-change treatment.
Interpret this metric with the stated reporting boundary, period convention, value shape, and unit. Results prepared with different boundaries or conventions may not be directly comparable.
Measurement evidence supports the core record-specific claims described above. Corroborative evidence can support limitations, while compatibility and status sources provide their separately labelled context. None of these cards by itself determines an organisation's legal applicability, filing readiness, assurance status, or compliance conclusion.