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Beyond the Label: The Sufficiency Approach Transforms EPDs from an Impact Measurement Tool to Critical Decision-Making Tool for Sustainable Design

ラベルを超えて：サフィシエンシー・アプローチがEPDを持続可能な設計のための意思決定ツールへと変革する (AI 翻訳)

A. Violano, Monica Cannaviello, Alessandra Battisti

Sustainability📚 査読済 / ジャーナル2026-03-21#炭素会計Origin: Global経営インパクト: 調達リスク対象セクター: construction
DOI: 10.3390/su18063088
原典: https://doi.org/10.3390/su18063088

🤖 gxceed AI 要約

日本語

本研究は、建築環境の脱炭素化におけるEPDの役割を、効率性だけでなく「どれだけ必要か」を問うサフィシエンシー（充足性）の視点から再評価する。ISO 21930とEN 15804の規制枠組みを分析し、比較可能性の「幻想」が実務上の不均一性によって生じることを指摘。機能単位と参照耐用年数の認識論的役割を強調し、EPDを政策・産業・設計を結ぶ境界オブジェクトとして位置づける。

English

This study repositions Environmental Product Declarations (EPDs) within a sufficiency paradigm for decarbonizing the built environment, arguing that efficiency alone is insufficient. It analyzes ISO 21930 and EN 15804, revealing an 'illusion of comparability' due to heterogeneous rules and assumptions. The paper emphasizes the epistemic role of functional units and reference service life, proposing EPDs as boundary objects integrating embodied and operational carbon in contextual decisions.

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

📝 gxceed 編集解説 — Why this matters

日本のGX文脈において

日本では、SSBJ開示や建築物省エネ法の動きを踏まえ、EPDの信頼性向上が重要。本論文は、日本の建設業界がEPDを活用する際の課題（比較可能性の欠如）を指摘し、サフィシエンシー視点の導入が今後の設計・政策に示唆を与える。

In the global GX context

Globally, as ISSB and CSRD drive demand for reliable environmental data, this paper challenges the comparability of EPDs, urging a sufficiency-based approach. It offers critical insights for policymakers and industry to enhance EPD credibility and integrate them into broader decarbonization strategies.

👥 読者別の含意

🔬研究者:EPDの方法論的限界とサフィシエンシー統合の理論的枠組みを提供し、今後の研究の基盤となる。

🏢実務担当者:EPDを設計・調達の意思決定に活用する際の注意点と、サフィシエンシー視点の導入方法を示す。

🏛政策担当者:EPDの標準化と比較可能性向上のための政策提言に資する。

📄 Abstract（原文）

This study situates Environmental Product Declarations (EPDs) within the broader challenge of decarbonising the built environment, arguing that efficiency-oriented approaches remain insufficient unless complemented by a sufficiency paradigm that already questions “how much is necessary” in the meta-design phase. Building on an interdisciplinary reading of standards and the scientific literature, the paper analyses the regulatory architecture of Type III environmental declarations and discusses the operational implications of the two main reference frameworks for construction EPDs—ISO 21930 (global) and EN 15804 (European)—with attention paid to methodological rigidity, system boundaries, and the granularity of climate-related indicators. The paper highlights that the declared aim of comparability is frequently undermined in practice by heterogeneous Product Category Rules, background databases, modelling assumptions, and verification practices, producing an “illusion of comparability” and limiting the reliability of product-to-product comparisons. Emphasis is placed on the epistemic role of the functional unit and reference service life, showing how narrowly product-based units can conceal system-level effects and bias decision-making. The paper concludes that EPDs are most effective when interpreted as boundary objects linking policy, industry, and design, and when embedded in a sufficiency-oriented “critical ecology of materials” that integrates embodied and operational carbon within contextualised project decisions.

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