Tier 1 suppliers screened for nature-related risks and classified as high priority
Measurement answer
What this metric measures
Reports the proportion of tier 1 suppliers assessed for nature-related risks and, among assessed tier 1 suppliers, the proportion classified as high priority, with results provided by spend and/or volume.
Specification
Metric specification
- Result format
- Structured table
- Unit
- % — source-defined reporting unit
- Reporting basis
- Reporting period
- Aggregation
- Proportion of tier 1 suppliers screened and proportion of screened tier 1 suppliers classified as high priority, reported by spend and/or volume.
- Pillar
- Governance
- Topic
- Nature-related risk screening in the supply chain
- Controlled domain
- Supply chain and value chain
- Entity type
- Metric
Reporting boundary
Tier 1 suppliers within the reporting organization's supply chain; high-priority classification applies only to suppliers assessed for nature-related risks.
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 DisclosureSource evidence
TNFD sector guidance
- Publisher
- Taskforce on Nature-related Financial Disclosures
- Edition
- Final English sector guidance collection through August 2026 (17 documents)
- Requirement
- Not Specified
- Relationship
- Defines Disclosure
- Mapping outcome
- Direct Evidence
- Source locator
- TNFD Additional Sector Guidance, Metals and Mining, p. 89, sector metric table, MM.A23.4. | Source evidence summary: disclose the proportion of tier 1 suppliers assessed for nature-related risks and the proportion of those assessed classified as high priority, with data provided by spend or volume. | Page 89, sector metric table, MM.A23.4
- Adopting DisclosureMM.A23.4
TNFD sector guidance
- Publisher
- Taskforce on Nature-related Financial Disclosures
- Edition
- Version 1.0, June 2024
- Requirement
- Recommended
- Relationship
- Maps Source Identity
- Mapping outcome
- Published
- Source locator
- Page 89, sector metric table, MM.A23.4
Value structure
Dimensions and units
- Unit
- % — source-defined reporting unit
- Reporting basis
- Reporting period
Unit meaning: Values use % under the disclosed TNFD sector-guidance method, reporting period and boundary.
Table fields and units
- measure
- calculation basis (spend or volume)
- numerator
- denominator
- proportion (%)
Published dimensions
- measure: tier 1 suppliers screened for nature-related risks
- measure: screened tier 1 suppliers classified as high priority
- basis: spend and/or volume
- supplier tier: tier 1
Calculation method
Formula information
- Status
- Specified
- Formula type
- Percentage
Formula
Screened tier 1 supplier proportion = (tier 1 suppliers assessed for nature-related risks / tier 1 suppliers in scope) × 100; high-priority proportion = (assessed tier 1 suppliers classified as high priority / tier 1 suppliers assessed for nature-related risks) × 100.Apply the source-defined TNFD sector-guidance method within the stated reporting boundary. This is a standalone additional-sector structured outcome metric: it reports two related supply-chain coverage and prioritization proportions, preserves their distinct denominators, and does not conflate screening with high-priority classification. No shortlisted metric has the same construct, population, value shape, and unit.
Variables
| Symbol | Variable | Definition | Unit |
|---|---|---|---|
S | Tier 1 suppliers assessed for nature-related risks | Tier 1 suppliers assessed for nature-related risks during the reporting period. | supplier population, spend, or volume basis |
T | Tier 1 suppliers in scope | Tier 1 supplier population forming the denominator for the screening proportion. | supplier population, spend, or volume basis |
H | Assessed tier 1 suppliers classified as high priority | Tier 1 suppliers assessed for nature-related risks and classified as high priority under the disclosed methodology. | supplier population, spend, or volume basis |
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 30 August 2026
TNFD additional sector guidance collection
- Publisher
- Taskforce on Nature-related Financial Disclosures
- Edition
- Final English sector guidance collection through August 2026 (17 documents)
- Locator
- TNFD Additional Sector Guidance, Metals and Mining, p. 89, sector metric table, MM.A23.4. | Source evidence summary: disclose the proportion of tier 1 suppliers assessed for nature-related risks and the proportion of those assessed classified as high priority, with data provided by spend or volume. | Page 89, sector metric table, MM.A23.4
Supports: The official TNFD sector guidance supports the identity, boundary and method basis of “Tier 1 suppliers screened for nature-related risks and classified as high priority”.
Open official source
Use with context
Interpretation boundaries
Method disclosures required
Source-edition basis: TNFD sector guidance, Final English sector guidance collection through August 2026 (17 documents).
- Disclose the methodology used to assess tier 1 suppliers for nature-related risks.
- Disclose the transparent methodology used to classify assessed suppliers as high priority.
- State whether each reported proportion is calculated using spend, volume, or both, and define the applicable denominator.
- State the tier 1 supplier population and reporting-period boundary.
Record-specific limitations
- The high-priority result depends on the organization's disclosed classification methodology.
- Spend- and volume-based results may not be directly comparable where supplier coverage or supplier measurement differs.
- The metric does not represent nature-risk screening beyond tier 1 suppliers.
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.