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Challenges within Closed-Loop Supply Chains: Conflict between Sustainability and System-wide Cost

Research Project

Project/Area Number 20K04971
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 25010:Social systems engineering-related
Research InstitutionAoyama Gakuin University

Principal Investigator

Hosoda Takamichi  青山学院大学, 国際マネジメント研究科, 教授 (50570123)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords循環型サプライチェーン / リサイクル / ブルウィップ効果 / サプライチェーン / 持続的社会 / ダイナミクス
Outline of Research at the Start

本研究では使用済み製品の市場からの回収から再生までのプロセスをも考慮した、いわゆる循環型サプライチェーンにおける効率化手法について主に数理モデルを活用して考察した上で、持続的社会とコスト経済性を両立させる施策を提案する。既往の研究では需要と回収は非常に簡易なモデル(例えば白色雑音)を設定するが、本研究ではより現実に近い時系列モデルを導入することで、既往の研究が見逃してきた新たなパラドックスが循環型サプライチェーンには存在することを数理的に示し、パラドックスの発生メカニズムの解明、さらにはパラドックスの緩和施策を見出す。高い歩留り率とシステム全体の低コストが両立する施策を提案する予定。

Outline of Final Research Achievements

Using a mathematical approach, this research investigates the characteristics of a supply chain with a circular loop (or, closed-loop supply chain), in which end-of-life products are collected from the market, recycled and then sold again. The products assumed in the study were PET bottles, for which recycling technology has been progressing and spreading in recent years. The main results of the study proved the existence of two paradoxes: 1) the longer the lead time from collection to recycling, the lower the overall cost of the supply chain; 2) even if the cost of recycling products from used products is lower than the cost of manufacturing products from raw materials, the cost of the entire supply chain may increase if the amount of recycling is increased.

Academic Significance and Societal Importance of the Research Achievements

従来の一方向の供給のみを対象としていたサプライチェーン分野の研究において、サプライチェーン内のリードタイムは短ければ短いほど全体のコストは下がると結論付けられていた。リードタイムが短ければ、計画する際にあまり遠い先まで予測しておく必要もなく、サプライチェーン全体をコントロールしやすいことがコストが小さくなる理由である。我々の研究成果は、このような従来型サプライチェーンでは常識であったことが、循環型サプライチェーンにおいては当てはまらないことを示唆している。また、再生コストが仮にかなり低いとしても、再生量をいたずらに増加させるとは、サプライチェーン全体のコスト上昇になる場合があることも示した。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (7 results)

All 2024 2023 2022 2021

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results) Presentation (6 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results)

  • [Journal Article] The yield rate paradox in closed-loop supply chains2021

    • Author(s)
      Hosoda Takamichi、Disney Stephen M.、Zhou Li
    • Journal Title

      International Journal of Production Economics

      Volume: 239 Pages: 108187-108187

    • DOI

      10.1016/j.ijpe.2021.108187

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Global dual sourcing: ARMA(1,1) demand and its decomposition2024

    • Author(s)
      Hosoda, T., Disney, S. M., Gaalman, G.
    • Organizer
      23rd International Working Seminar on Production Economics
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Autocorrelated Price-sensitive Demand and the Dynamics of Supply Chains2023

    • Author(s)
      Hosoda, T., Disney, S. M., Gaalman, G.
    • Organizer
      INFORMS Annual Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Supply chain dynamics and economics based on autocorrelated price models and linear demand models2023

    • Author(s)
      Hosoda, T., Disney, S. M., Gaalman, G.
    • Organizer
      日本経営工学会春季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Non-stationary price and demand processes in a supply chain2023

    • Author(s)
      T. Hosoda
    • Organizer
      CSAM Meeting, Exeter Business School
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Impact of customers reaction to autocorrelated price sensitive demand on supply chains2022

    • Author(s)
      T. Hosoda
    • Organizer
      53rd Annual Conference of the Decision Sciences Institute
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Impact of correlated price sensitive demand on the dynamics and economics of supply chains2022

    • Author(s)
      S.M. Disney
    • Organizer
      6th World Conference on Production and Operations Management
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research

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Published: 2020-04-28   Modified: 2025-01-30  

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