Data-Informed Construction Method Selection Considering Carbon Emissions At The Tender Stage: Evidence From A Public Building Project In Vietnam
炭素排出を考慮した入札段階での建設工法のデータに基づく選択：ベトナムの公共建築プロジェクトの事例から (AI 翻訳)
Huong T. T. Le, Quan The Nguyen, Lương Nhật Vinh Hồ, Quang Thai Pham
🤖 gxceed AI 要約
日本語
本論文は、入札段階で炭素排出量を評価基準に組み込むデータ駆動型の工法選択手法を提案する。ベトナムの公共建築プロジェクトにおける杭打ち工事の事例分析により、工期短縮型の工法は総排出量が多いが時間的集中度が高いことを示し、炭素コストを考慮しても資源効率の観点から優位であることを明らかにした。排出量の評価には機械出力や稼働時間などの入札データを活用している。
English
This paper proposes a data-driven approach to incorporate carbon emissions into construction method selection at the tender stage. Using a case study of pile installation in a Vietnamese public building, it shows that faster methods generate higher but more concentrated emissions, and remain preferable when carbon costs are integrated due to resource efficiency. Emissions are estimated from operational data like machine power and shift schedules.
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
日本でも建設工事の入札において炭素排出量の評価が注目されつつあるが、本手法はLCAに頼らずとも一般的な入札データから排出量を推定できる点で実用的である。特にSSBJや有報でのサプライチェーン排出開示が進む中、建設段階の排出削減に向けた意思決定支援として参考になる。
In the global GX context
Globally, embodied carbon regulations are emerging (e.g., EU Level(s), California's Buy Clean). This study demonstrates a practical method for integrating carbon into procurement without full LCA, using readily available tender data. It highlights that even modest carbon pricing may not shift decisions unless aligned with cost and schedule, informing the design of effective procurement policies.
👥 読者別の含意
🔬研究者:Provides a replicable method for estimating construction-phase emissions from operational data, useful for developing tender-stage carbon criteria.
🏢実務担当者:Construction firms and project owners can apply this approach to evaluate and compare bids based on carbon emissions alongside cost and duration.
🏛政策担当者:Offers evidence that low carbon prices alone may not influence tender decisions, suggesting the need for stronger regulatory signals or alignment with economic incentives.
📄 Abstract（原文）
Carbon emissions in the construction phase are largely determined by early project decisions, yet they are rarely incorporated as explicit criteria at the tender stage. Instead, emissions are typically assessed after method selection or treated as qualitative compliance indicators, limiting their influence on decision-making. This study proposes a data-informed approach to construction method selection that integrates carbon emissions into tender-stage evaluation using operational data commonly available in bidding documentation. Rather than relying on full life-cycle assessment models, emissions are estimated from machine power, working shifts, and operating time, and incorporated alongside cost and duration in comparing construction alternatives. The approach is illustrated through a case-based analytical study of pile installation works in a public building project in Vietnam, involving two alternative equipment configurations. The results show that while the faster alternative generates higher total emissions, its emissions are more temporally concentrated, revealing trade-offs that remain hidden when decisions are based solely on cost and schedule. Importantly, when emissions are translated into indicative carbon cost and integrated into a construction cost equivalent framework, the faster alternative remains preferable due to its superior resource efficiency. These findings demonstrate that construction-phase emissions are shaped not only by technological choices but also by organizational configurations. They further suggest that modest carbon-cost signals alone may be insufficient to alter tender-stage decisions, highlighting the need to align environmental indicators with broader economic and operational performance criteria.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.7771/3067-4883.2225first seen 2026-07-06 04:36:38
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