規模拡大の環境・サプライチェーンコスト：K-12の1人1台端末構想における電子廃棄物・エネルギー使用・汚染のシナリオベース推計フレームワーク

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

🔬研究者:公共調達のライフサイクル環境影響を、公開データで再現可能に推計する手法として参考になる。

🏢実務担当者:端末更新・調達計画に環境コストと廃棄物推計を組み込む際の実務テンプレートとして活用できる。

🏛政策担当者:GIGA端末更新など公共ICT調達の環境影響評価を政策・予算判断に反映する根拠になり得る。

Background: Large-scale one-to-one computing initiatives in K-12 education generate supply chain and environmental impacts that are rarely quantified before procurement decisions are made. Methods: This study applies a scenario-based environmental estimation approach, informed by supply chain management principles, to model manufacturing inputs, operational energy consumption, carbon dioxide (CO2) emissions, and end-of-life electronic waste for a representative U.S. school district deploying approximately 32,492 laptops across a standard 3-year replacement cycle, using publicly available lifecycle and energy data rather than proprietary manufacturer figures. Results: Manufacturing the device fleet is estimated to require approximately 48.7 million kg of water and 7.8 million kg of fossil fuels. In-service operation generates approximately 711,575 kWh of annual electricity demand and approximately 264 metric tons of CO2 emissions from device charging. One replacement cycle is estimated to generate approximately 55.3 metric tons of mixed-material e-waste, accumulating to approximately 165.8 metric tons across three cycles (9 years). Conclusions: Large-scale device procurement carries predictable environmental costs across the device lifecycle. The study contributes a replicable estimation framework that institutional decision-makers can use to incorporate these costs into procurement planning for similarly scaled K-12 public sector districts; further validation is needed before extending the findings to nonprofit or private-sector contexts.

• semanticscholar https://doi.org/10.3390/logistics10100225first seen 2026-10-01 05:15:14 · last seen 2026-10-02 05:11:57