By Emmanuel Delplanque, Co-Founder & CEO of BE-CAUSE. A corporate Scope 3 target may look precise on a sustainability report. The operational question is much harder: which suppliers must change, what evidence do they need to provide, and how does each supplier's pathway add up to the company's 2030 ambition?
For many procurement and sustainability teams, the answer is still a spreadsheet of incomplete questionnaires, mixed reporting years and supplier declarations that cannot easily be compared. This is where a supplier climate-maturity screen becomes useful. It does not replace a full audit. It creates the evidence base that tells a buyer where a full audit, a supplier-development programme or an engineering dialogue will have the highest value.
Net Zero Pulse is designed as a rapid, scalable supplier climate-maturity screening. It checks the existence and recency of a GHG inventory, Scope 1 and Scope 2 coverage, relevant Scope 3 categories, and formal near- and long-term targets. The output is a maturity score and an engagement pathway for each supplier, before a buyer commits time and budget to deep assessments. The objective is not to generate a prettier portfolio average. It is to turn supplier evidence into an actionable climate programme.
The real problem: a target without a supplier pathway
Consider an automotive supplier with a corporate commitment of −45% emissions by 2030 and Net Zero by 2042. With 2,500 Tier-1 suppliers, the company cannot credibly treat every supplier in the same way. A small number may be strategically important or carbon-intensive; many others form a long tail with limited spend and limited emissions exposure.
The relevant question is therefore not, “How many suppliers can we survey?” It is, “How much of the footprint can we understand and influence with a disciplined supplier-engagement campaign?” The illustrative Net Zero Pulse scenario used in the visual above answers that question. It screens 500 suppliers from a 2,500-supplier universe, covering 81% of supply-chain emissions. These values are synthetic and illustrative, but the methodology is directly applicable to real supplier portfolios.
| Screening insight | Illustrative result | What it means for procurement |
|---|---|---|
| Suppliers screened | 500 | A focused cohort is more manageable than a blanket request to 2,500 companies. |
| Supply-chain emissions covered | 81% | Engagement is concentrated where the carbon exposure sits. |
| Suppliers with no GHG report | 342 | The first task is basic carbon-accounting capacity, not an advanced reduction workshop. |
| Suppliers with Scope 1 & 2 only | 64 | These suppliers need support to expand their reporting boundary. |
| Suppliers with detailed Scope 3 | 94 | These are candidates for product, process and lifecycle collaboration. |
| Suppliers with a near-term target | 76 | These targets can be tracked against evidence and milestones. |
| Suppliers with a long-term target | 4 | These suppliers can become peer examples, not proof that the whole portfolio is ready. |
The maturity rows add up to the 500-supplier screening base. The near-term and long-term target figures are overlays, not additional suppliers: a supplier with detailed Scope 3 may also have a target.
What a Net Zero Pulse actually checks
A useful supplier screen asks a short set of questions that can be answered consistently at scale. Net Zero Pulse is structured around four evidence areas.
First, it establishes whether a supplier has completed a GHG inventory, and when it was last updated. An inventory that has not been refreshed for several years may be useful context, but it is not the same as current decision-grade evidence.
Second, it maps Scope 1 and Scope 2. This confirms whether the supplier understands its direct fuel and purchased-energy emissions. It is a necessary foundation, but it does not reveal the full climate relevance of most supply-chain relationships.
Third, it tests the depth of Scope 3 coverage. The screen pays particular attention to categories that commonly matter in complex value chains: 3.1 purchased goods and services, 3.11 use of sold products and 3.12 end-of-life treatment. The relevant categories will vary by industry, but the method requires the buyer and supplier to identify where the footprint actually sits rather than treating Scope 3 as a single undifferentiated number.
Fourth, it checks commitment quality. Has the supplier published a near-term target? Is there a long-term target? Is the target externally validated? What is the baseline year, target year and boundary? This distinguishes a stated ambition from a target that can be tracked in a buyer–supplier engagement plan.
From maturity scores to a bottom-up portfolio curve
Supplier scores become strategically useful when they are linked to carbon exposure. A supplier with low maturity and negligible emissions may need a standard request and light-touch guidance. A supplier with low maturity and high exposure is a priority risk: the buyer needs basic activity data, a first inventory and a defined timeline. A mature, high-exposure supplier is a potential decarbonisation partner. The method has five steps.
1. Start with each supplier's own carbon footprint
The portfolio is not modelled as one average supplier. Each supplier begins with its own baseline footprint. This avoids the common mistake of letting a large number of small suppliers distort the decision while high-emission suppliers remain hidden.
2. Use a recorded 2030 commitment where one exists
If a supplier has a formal 2030 target, the model captures its stated baseline year, reduction level, target year and boundary. The target is then re-based transparently against the supplier's current portfolio baseline. A recorded supplier target remains a supplier target; it is not rewritten as a buyer commitment.
3. Use a disclosed maturity-based pathway where a commitment is missing
Many suppliers will not yet have a formal 2030 commitment. In that case, the method does not pretend that a target exists. It applies a clearly labelled extrapolation based on the supplier's maturity and the type of support planned. A Level 1 supplier may initially need time to establish a GHG inventory; a Level 3 supplier may have the evidence required to begin a product-lifecycle reduction programme; Levels 4 and 5 may be subject to progressively stronger target-delivery follow-up. An extrapolation is a planning assumption, not a supplier claim. Keeping the two separate is essential for credibility.
4. Sum the individual supplier curves
The portfolio curve is the direct sum of individual annual supplier footprints. This creates a transparent link between the supplier data, the buyer's engagement choices and the resulting portfolio pathway. It also makes it possible to test scenarios without hiding assumptions inside a single percentage.
5. Compare engagement scenarios with the corporate ambition
The visual shows three indexed 2025–2030 pathways. The current supplier pathway ends at index 80 in 2030. A faster full-onboarding pathway, beginning in 2026, ends at index 70. The company's illustrative SBTi Scope 3 reference reaches index 58, equivalent to a −42% reduction from the 2025 baseline.
These are not forecasts. They are scenario paths designed to show the gap between a supplier programme and a corporate ambition. The point is not that a buyer can declare success when a model shows an index. The point is to make the remaining work visible: more supplier commitments, better activity data, engineering interventions, commercial levers and stronger target follow-up.
Why this is more efficient than a blanket audit programme
A mature supplier-engagement strategy does not ask every company for every document on day one. That approach creates avoidable administrative work for suppliers and buyers alike, while making it harder to see which responses deserve attention. A climate-maturity pulse creates efficiency in four ways.
- It targets effort by carbon relevance. When the screening cohort represents a large share of the footprint, the buyer can prioritise conversations with suppliers whose data and actions are most consequential.
- It reduces duplicated questionnaires. A short, standardised evidence request creates comparable records across suppliers, so teams can route each supplier to the right next step instead of repeatedly asking for the same information in different formats.
- It makes supplier awareness practical. A supplier with no inventory needs a different conversation from one with detailed lifecycle data. Maturity results turn an abstract climate expectation into a clear next action.
- It protects scarce audit capacity. Deep assessments, on-site verification and collaborative engineering should be reserved for the suppliers where the evidence indicates the highest risk or opportunity.
What buyers should do next
The most effective first campaign is rarely the largest possible campaign. It is the campaign with a clear footprint hypothesis, a defined evidence request and a commitment to act on the results.
Start by selecting a cohort of strategic suppliers. Set a data request covering GHG inventory status, scope coverage, the most relevant Scope 3 categories and target status. Define what happens at every maturity level before launching the request: basic carbon-accounting guidance for suppliers with no inventory, boundary-expansion support for Scope 1 and 2 reporters, lifecycle collaboration for advanced suppliers, and periodic evidence reviews for target-setting leaders.
Then use the results to build a portfolio pathway. Keep actual commitments separate from maturity-based planning assumptions. Use the first campaign to decide where a Strategic Supplier Development Program or a physical verification is warranted, rather than trying to solve every supplier issue with one generic questionnaire.
“Net Zero Pulse turns a supplier portfolio blind spot into a prioritised climate-action agenda: from “we have a Scope 3 target” to “we know which suppliers, evidence and actions must underpin it.””
Ready to take the pulse of your supplier ecosystem?
Start with a block of 50 suppliers, then scale the campaign across the parts of the value chain that carry the greatest carbon exposure. Net Zero Pulse is priced at ¥4,000 / €550 per block of 50 suppliers and is designed to provide a rapid, comparable climate-maturity baseline before deeper supplier development.