Methodology
Structured, conservative climate estimates grounded in published research — transparently documented.
Tuleva provides structured, comparable climate estimates for circular fashion actions such as repair, resale, and rental.
These estimates represent avoided production emissions. They are not full product Life Cycle Assessments (LCAs) and are not designed for regulatory carbon audits.
1
Scope
Tuleva estimates avoided emissions associated with extending the life of garments through circular actions.
We compare:
- The emissions required to produce a new garment (baseline)
- The emissions generated by the circular action
- A conservative displacement factor
The result represents estimated avoided production emissions.
3
Baseline Data Sources
Baseline production values are derived from:
- Published textile LCAs
- Peer-reviewed academic research
- Industry benchmarks
- Recognized secondary LCA databases
Where emission ranges exist, Tuleva applies conservative mid-range or lower-bound values to avoid overstatement.
Assumptions are documented and subject to refinement as improved data becomes available.
2
System Boundary
Baseline (New Production)
Modeled using cradle-to-gate boundaries, including:
- Raw material extraction
- Fiber processing
- Fabric production
- Manufacturing
- Transport to distribution stage
Circular Activity
Includes only emissions directly linked to the circular event, such as:
- Repair materials and operational energy
- Resale logistics and cleaning (where applicable)
- Rental cleaning and transport
Excluded from this model:
- Consumer use phase
- End-of-life impacts
- Corporate Scope 1–3 emissions
- Full product lifecycle accounting
4
Displacement Modeling
Avoided emissions depend on the extent to which circular actions reduce the need for new production.
Tuleva applies conservative displacement factors rather than assuming automatic 1:1 replacement.
Displacement rates are:
- Explicitly stated
- Transparent
- Updated as research evolves
6
Limitations
Tuleva’s estimates:
- Are not full LCAs
- Are not third-party verified carbon credits
- Are not designed for regulatory carbon disclosure
- Does not replace formal carbon accounting tools
They are structured, conservative signals intended to make circular activity visible and comparable.
5
Calculation Logic (Illustrative Example)
Example: Cotton Jacket Repair
Baseline production emissions: 25 kg CO₂e
Repair emissions: 2 kg CO₂e
Displacement rate: 0.8
Avoided Emissions
= (25 × 0.8) – 2
= 18 kg CO₂e avoided
This example is illustrative. Final values vary depending on garment type, material composition, and data source.
7
Continuous Improvement
Circular impact measurement remains an evolving field.
Tuleva will continue refining:
- Baseline data sources
- Displacement assumptions
- Emission factors
As regulatory frameworks develop and research advances.
Our priority is clarity, transparency, and responsible modeling.
Tuleva provides structured, comparable climate estimates for circular fashion actions such as repair, resale, and rental.
These estimates represent avoided production emissions. They are not full product Life Cycle Assessments (LCAs) and are not designed for regulatory carbon audits.
1
Scope
Tuleva estimates avoided emissions associated with extending the life of garments through circular actions.
We compare:
- The emissions required to produce a new garment (baseline)
- The emissions generated by the circular action
- A conservative displacement factor
The result represents estimated avoided production emissions.
2
System Boundary
Baseline (New Production)
Modeled using cradle-to-gate boundaries, including:
- Raw material extraction
- Fiber processing
- Fabric production
- Manufacturing
- Transport to distribution stage
Circular Activity
Includes only emissions directly linked to the circular event, such as:
- Repair materials and operational energy
- Resale logistics and cleaning (where applicable)
- Rental cleaning and transport
Excluded from this model:
- Consumer use phase
- End-of-life impacts
- Corporate Scope 1–3 emissions
- Full product lifecycle accounting
3
Baseline Data Sources
Baseline production values are derived from:
- Published textile LCAs
- Peer-reviewed academic research
- Industry benchmarks
- Recognized secondary LCA databases
Where emission ranges exist, Tuleva applies conservative mid-range or lower-bound values to avoid overstatement.
Assumptions are documented and subject to refinement as improved data becomes available.
4
Displacement Modeling
Avoided emissions depend on the extent to which circular actions reduce the need for new production.
Tuleva applies conservative displacement factors rather than assuming automatic 1:1 replacement.
Displacement rates are:
- Explicitly stated
- Transparent
- Updated as research evolves
5
Calculation Logic (Illustrative Example)
Example: Cotton Jacket Repair
Baseline production emissions: 25 kg CO₂e
Repair emissions: 2 kg CO₂e
Displacement rate: 0.8
Avoided Emissions
= (25 × 0.8) – 2
= 18 kg CO₂e avoided
This example is illustrative. Final values vary depending on garment type, material composition, and data source.
6
Limitations
Tuleva’s estimates:
- Are not full LCAs
- Are not third-party verified carbon credits
- Are not designed for regulatory carbon disclosure
- Does not replace formal carbon accounting tools
They are structured, conservative signals intended to make circular activity visible and comparable.
7
Continuous Improvement
Circular impact measurement remains an evolving field.
Tuleva will continue refining:
- Baseline data sources
- Displacement assumptions
- Emission factors
As regulatory frameworks develop and research advances.
Our priority is clarity, transparency, and responsible modeling.