LCA as a Tool for Consensus: Lessons from Practice Across Sectors

LCA as a Tool for Consensus: Lessons from Practice Across Sectors

By Amos Ncube, Senior Sustainability Advisor and Mariana Ortega Ramirez, Senior Sustainability Analyst

Life cycle assessment (LCA) is often introduced as a method for quantifying environmental impacts. In practice, however, its value increasingly lies elsewhere: in its ability to structure dialogue, surface assumptions, and support consensus among stakeholders with different priorities, incentives, and constraints.

This has become particularly evident in recent years, as sustainability considerations move from reporting exercises to core business and policy decisions. Whether in agriculture, bioproducts, or energy systems, organizations are being asked not only to demonstrate performance, but to align around credible, comparable, and transparent ways of measuring it.

Several projects we have worked on at EarthShift Global illustrate how LCA, when combined with careful facilitation, can serve as a platform for alignment rather than contention.

LCA in Investment and Supplier Decisions

In one recent engagement, a company with sustainability embedded in its corporate strategy faced a critical investment decision: whether or not to build a new manufacturing facility in a foreign country that would be co-located with, and dependent on, a long-term supplier of a key input ingredient.

The product relied on a cash crop-based material, with environmental hotspots concentrated in agricultural production and energy use during processing. Multiple suppliers offered the same functional ingredient, each presenting LCA results intended to demonstrate superior environmental performance. Carbon footprint was a central consideration, alongside cost, logistics, and long-term partnership potential.

When the decision was narrowed to three suppliers, EarthShift Global was asked to assess and compare their environmental profiles. This proved to be a non-trivial exercise. Each supplier had conducted its LCA using different tools, databases, allocation approaches, impact assessment methods, and assumptions regarding the bill of materials. At the same time, all information was protected under strict non-disclosure agreements: footprint indicators could be shared with the company, but proprietary process details could not.

Our task was to develop LCA models that were both representative of each supplier’s specific supply chain and sufficiently harmonized to allow comparison. This required extensive communication with all parties, careful treatment of primary data, and transparency about sources of uncertainty. Once baseline models were established, we explored future-oriented scenarios reflecting potential investments suppliers might make over the next five years, including changes in agricultural practices, energy systems, fuel type and carbon capture.

As with many real-world LCAs, methodological differences could not be fully eliminated. Allocation choices and data limitations introduced uncertainty that needed to be acknowledged explicitly. Yet the process itself proved valuable. By grounding discussions in a shared analytical framework, the company and its suppliers were able to move beyond headline numbers toward a clearer understanding of trade-offs, risks, and opportunities.

Aligning Perspectives in the Cotton Sector

A similar dynamic emerged in our work developing a position paper on the use of LCA in sustainability measurement for the cotton sector. The project involved a consortium of cotton organizations, sustainability programs, and non-profits, all committed to improving environmental and social outcomes, but not always aligned on how progress should be defined or measured.

Here, the challenge was less about comparing products and more about reconciling perspectives. Stakeholders differed in their views on appropriate indicators, data requirements, and the role of LCA relative to other approaches. Our role was to listen carefully, map points of convergence and divergence, review the existing literature, and synthesize this information into a document that could speak credibly to multiple audiences.

Rather than prescribing a single solution, the position paper emphasized transparency, inclusivity, and clarity around assumptions. It reflected a broader lesson we encounter repeatedly: measurement frameworks gain legitimacy not only through technical robustness, but through processes that stakeholders recognize as fair and trustworthy.

Harmonization in Energy Context (Transportation Fuels)

The importance of consensus-building through LCA is perhaps most visible in the energy sector, where methodological differences can have significant regulatory and commercial implications. In our work supporting a group of member organizations in the oil and gas sector on the development of a harmonized LCA approach for transportation fuels, EarthShift Global reviewed a wide range of existing models, regulatory programs, and guidance documents. Differences in system boundaries, allocation procedures, emissions factors, and treatment of co-products can lead to materially different carbon intensity results for the same fuel pathway. Addressing this required not only technical analysis, but structured engagement with these member companies. Through facilitated working sessions, we identified areas of alignment, clarified sources of divergence, and developed a transparent framework for comparing methodologies. An important, and sometimes underestimated, aspect of this process was the alignment of terminology. In LCA, differences in how concepts are named or defined can create unnecessary barriers to communication, even when underlying approaches are similar. Establishing a common language proved essential for effective dialogue and for enabling member companies to engage more productively with one another and with external stakeholders.

The outcome was a consensus-based approach that supports more consistent assessment and more coherent engagement with regulators and external stakeholders. In a period when oil and gas systems are under increasing scrutiny driven by climate objectives, market volatility, and renewed attention to global supply dynamics the ability to ground discussions in shared analytical foundations becomes especially important.

From Measurement to Agreement

Across these projects, one pattern stands out. As LCA is increasingly used to inform decisions rather than simply document impacts, the need for facilitation, transparency, and stakeholder engagement grows. Technical rigor remains essential, but it is rarely sufficient on its own.

LCA provides a common language, but consensus depends on how that language is applied: how assumptions are made explicit, how uncertainty is communicated, and how competing interests are acknowledged without compromising analytical integrity.

As sustainability challenges become more interconnected and contentious, the role of LCA as a tool for structured dialogue will likely continue to expand. In our experience, its greatest contribution is not only in measuring impacts, but in helping organizations find common ground in complex systems.