Quantify enabled and missed emissions beyond Scope 1–3.

This engine provides conservative decision-support estimates designed to sit alongside Scope 1–3 accounting as a separate decision-support layer.

“Scope 4” is an informal label introduced by the World Resources Institute in 2013 for avoided emissions. It is not defined by the GHG Protocol. This engine adopts that inherited term. The original contribution here is the Opportunity Emissions methodology.

Two lenses sit beneath the Scope 4 umbrella here: Enabled Emissions (aligned with the WBCSD avoided-emissions standard) and Opportunity Emissions (the original Forensic Futurist framing).

Methodology

Choose your Scope 4 lens

Estimates emissions avoided beyond your boundary due to your product, service, or technology. Annual figure. Use conservative baselines and transparent boundaries.

Step 1 — Baseline & solution intensity

Baseline emissions intensity

Example: kg CO₂e per 1,000 wash cycles (define your functional unit clearly).

Solution emissions intensity

Should be measured using the same boundaries and functional unit as baseline.

Step 2 — Adoption scale

Units deployed

Annual functional units per deployed unit

Step 3 — Attribution & conservatism

Attribution share

0%70%100%

If savings are shared (technology + behavior), attribute conservatively.

Conservatism factor

30%70%100%

Default is conservative. Increase only if you have strong validation.

Estimates preventable emissions that persist due to delayed or unimplemented efficiency opportunities. Choose a quantified pathway (cumulative over the delay window) or a qualitative diagnostic for prioritization.

Step 1 — Establish the counterfactual

The tool does not accept an asserted “waste” number. State a baseline and an achievable target. The gap between them is computed and shown.

Baseline annual consumption

Current measured consumption (kWh/year, m³/year, liters/year). Use a consistent unit.

Achievable annual consumption

Consumption once the efficiency is implemented. Must be at or below the baseline.

Step 2 — Emission factor & transparent basis

Emission factor

Example: grid intensity kg CO₂e/kWh (country-specific).

Resource unit label

Used to label the gap and the result.

Baseline source (required)

What is the baseline measured against? The counterfactual must be transparent.

Availability validated by (required)

Who confirmed the efficiency is actually available? The tool will not count an unvalidated gap.

Step 3 — Delay & likelihood

Delay duration

The result is cumulative across this window, not annual.

Implementation probability

0%60%100%

Step 4 — Conservatism

Conservatism factor

30%50%100%

Default is conservative to reduce over-claiming.

Readiness diagnostic — qualitative prioritization only

This module is a prioritization heuristic. It maps organizational signals to a priority level. It is not an emissions measurement, and its loss band has no standardized basis. Do not use any figure here for reporting or external claims.

Score each signal from 1 (strong) to 5 (weak).

Decision latency

Psychological safety

Measurement maturity

Idea adoption rate

Cross-functional friction

Prioritization signal

—

Mapped from average signal score.

Optional: show an illustrative CO₂e range. I understand it is a heuristic, not an emissions estimate, and must not be used for reporting or external claims.

Annual energy consumption

Grid emission factor

Conservatism factor

30%50%100%

Methodology (high level)

Scope 4A Enabled Emissions: Avoided emissions beyond your organizational boundary enabled by your product/service/technology. Aligned with the WBCSD Guidance on Avoided Emissions v2.0 (2025), the product-level standard built on reference-scenario definition and contribution validation. This engine applies that discipline at the decision level. Annual figure.
Scope 4B Opportunity Emissions: Emissions that persist due to delayed or unimplemented efficiency opportunities. The quantified pathway counts only a gap below a stated, validated baseline, and reports cumulatively over the stated delay window. The diagnostic pathway is a qualitative prioritization heuristic and does not produce a reportable emissions figure.

Attribution: “Scope 4” is a contested, unowned umbrella term introduced by the World Resources Institute (WRI) in 2013 and is not formally defined under the GHG Protocol. The original contribution here is the Opportunity Emissions framing (4B). 4A integrates the orthodox WBCSD avoided-emissions methodology. This tool provides decision-support estimates designed to sit alongside (not replace) Scope 1–3 reporting.

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Quantify enabled and missed emissions beyond Scope 1–3.

Download your summary (PDF)

Choose your Scope 4 lens

Methodology (high level)