Enterprise Scope 3 Data Collection: Beyond Spend-Based Estimates

Large enterprises with thousands of suppliers cannot rely on spend-based sector averages alone, and an annual survey with a low response rate will not scale either. Automated collection is what lets a Category 1 list move from industry estimates to primary, supplier-specific data.

Automated supplier emissions data collection

DitchCarbon provides verified emissions data for over 2 million organisations, built on primary emissions data wherever it exists, so a meaningful share of a large supplier base is already covered before a request goes out. Requests that are still needed go out prepopulated with what a supplier has already published, through DitchSurvey, so the supplier reviews and corrects rather than compiling a response from scratch, which drives a higher response rate than a cold survey. Supplier-specific emissions are captured at spend, activity and product level, and a published product carbon footprint for a named item is automatically matched to the lines in a buyer's spend where that item is bought. DitchCarbon runs in production on supply chains of over 100,000 suppliers, and the same prepopulated method works whether the target list is a few hundred priority suppliers or the full base. Hotspotting decides where the conversations start, sorting suppliers by embodied emissions through a four step maturity ladder, but it does not limit how far engagement reaches: because requests go out from the platform rather than an inbox, and every reply type, a corrected figure, an uploaded report, a product carbon footprint or an EPD, is read into the same record, the method scales the same way for 100 suppliers as for 10,000.

The reporting standard's own terms matter here. Of the primary data types, a supplier's own reported inventory applied to spend, its activity data, and a published product carbon footprint are all primary under the GHG Protocol. Only a sector average applied to spend is secondary. So moving beyond spend-based estimates does not always mean waiting on a new survey response: a supplier's own published inventory, applied to the buyer's spend with it, is often already available and already primary data.

Financed emissions and supply chain reporting

Enterprises with both a supply chain and an investment or lending book can use the same verified layer for both. For counterparties or holdings, DitchCarbon maps company data to the PCAF hierarchy, so a portfolio review can show which figures are already disclosed and which remain modelled. Entity resolution against DUNS, LEI and ISIN identifiers keeps supplier and counterparty records matched to the correct legal entity as both lists change, and every figure, on either side, carries its source and change history.

Common questions on Scope 3 and supplier emissions management

How can large enterprises move beyond spend-based Scope 3 estimates?

By using a hybrid calculation that applies the most accurate method available per line: a published product carbon footprint first, then a supplier's disclosed activity data, then the supplier's own reported inventory applied to spend (which is primary data, not a sector average), and an industry factor only where none of that exists. DitchCarbon shows which method produced each line, so a team can see exactly how much of a baseline still rests on a generic factor.

What is the fastest way to collect supplier emissions data across a large supply chain?

Requests go out prepopulated with what a supplier has already published, through DitchSurvey, so the supplier reviews and corrects rather than starting from a blank questionnaire. Because a large share of a typical supplier list already has some form of published emissions data, meaningful coverage often exists before a single request goes out.

Can supplier emissions data feed both procurement and financed emissions reporting?

Yes. The same verified company data, at spend, activity and product level, supports supplier engagement on the procurement side and PCAF-hierarchy mapping for any of those same organisations that also sit in an investment or lending book, matched by entity resolution against DUNS, LEI and ISIN identifiers.