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A decision framework for incorporating the coordination and behavioural issues in sustainable supply chains in digital economy

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  • Patanjal Kumar

    (Kandoli Campus)

  • Sachin Kumar Mangla

    (O P Jindal Global University)

  • Yigit Kazancoglu

    (Yasar University, Logistics Management)

  • Ali Emrouznejad

    (Surrey Business School, University of Surrey)

Abstract

Global warming, climate change, and social problems are the worst human-induced sustainability issues that economies across the globe have witnessed. Water pollution, greenhouse effect, poor working conditions, child labour and lack of coordination among channel partners have caused the considerable interruptions in the supply chain network. The purpose of the paper is to identify critical factors affecting behavioural and sustainable supply chain coordination and evaluate strategies for risk reduction in the supply chain coordination in the context of digitization. This study purposes a novel supply chain coordination framework which consists of four themes such as system, actor, objective and action on which the success or the failure of supply chain can be contingent. Our study integrates multi-criteria decision approach using Fuzzy Analytic Hierarchy Process (Fuzzy-AHP) and Fuzzy Decision-Making Trial and Evaluation Laboratory (Fuzzy-DEMATEL) to investigate factors that affected the behavioural and sustainable supply chain coordination in the context of digitization. The Fuzzy-AHP method qualified to hierarchically rank the factors based on the relative fuzzy weightage while Fuzzy-DEMATEL established the inter-relationships among the factors and classified them into cause and effect groups. The findings of our study identified the Environmental performance and decarbonization as the most significant factor and the speed to market as the least important factor in developing behavioural and sustainable supply chain coordination in the context of digitization. Our analysis from Fuzzy AHP-DEMATEL approach reveal that the social preferences (power balance, reciprocity, fairness) is a significant causal factor which can effectively abolish the issues plaguing behavioural and sustainable supply chain coordination in the context of digitization. The results from our study aim to facilitate decision makers in cultivating a sustainable supply chain framework that can boost trust among the channel partners environmental performance, social performance and channel efficiency of the supply chain, thereby ensuring sustainability and socio welfare of all the supply chain.

Suggested Citation

  • Patanjal Kumar & Sachin Kumar Mangla & Yigit Kazancoglu & Ali Emrouznejad, 2023. "A decision framework for incorporating the coordination and behavioural issues in sustainable supply chains in digital economy," Annals of Operations Research, Springer, vol. 326(2), pages 721-749, July.
    • Handle: RePEc:spr:annopr:v:326:y:2023:i:2:d:10.1007_s10479-022-04814-0
    DOI: 10.1007/s10479-022-04814-0
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    1. Liu, Weihua & Wei, Wanying & Choi, Tsan-Ming & Yan, Xiaoyu, 2022. "Impacts of leadership on corporate social responsibility management in multi-tier supply chains," European Journal of Operational Research, Elsevier, vol. 299(2), pages 483-496.
    2. Panda, S. & Modak, N.M. & Basu, M. & Goyal, S.K., 2015. "Channel coordination and profit distribution in a social responsible three-layer supply chain," International Journal of Production Economics, Elsevier, vol. 168(C), pages 224-233.
    3. Ernst Fehr & Klaus M. Schmidt, 1999. "A Theory of Fairness, Competition, and Cooperation," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 114(3), pages 817-868.
    4. Yongbo Li & Ali Diabat & Chung-Cheng Lu, 2020. "Leagile supplier selection in Chinese textile industries: a DEMATEL approach," Annals of Operations Research, Springer, vol. 287(1), pages 303-322, April.
    5. Shameek Konar & Mark A. Cohen, 2001. "Does The Market Value Environmental Performance?," The Review of Economics and Statistics, MIT Press, vol. 83(2), pages 281-289, May.
    6. Kahneman, Daniel & Knetsch, Jack L & Thaler, Richard H, 1986. "Fairness and the Assumptions of Economics," The Journal of Business, University of Chicago Press, vol. 59(4), pages 285-300, October.
    7. Jianhua Ma & Xingzheng Ai & Wen Yang & Yanchun Pan, 2019. "Decentralization versus coordination in competing supply chains under retailers’ extended warranties," Annals of Operations Research, Springer, vol. 275(2), pages 485-510, April.
    8. Qi, Yinan & Mao, Zhigang & Zhang, Min & Guo, Hangfei, 2020. "Manufacturing practices and servitization: The role of mass customization and product innovation capabilities," International Journal of Production Economics, Elsevier, vol. 228(C).
    9. Srinivasan Raghunathan, 2001. "Information Sharing in a Supply Chain: A Note on its Value when Demand Is Nonstationary," Management Science, INFORMS, vol. 47(4), pages 605-610, April.
    10. Panda, Shibaji, 2014. "Coordination of a socially responsible supply chain using revenue sharing contract," Transportation Research Part E: Logistics and Transportation Review, Elsevier, vol. 67(C), pages 92-104.
    11. Jose A. Guajardo & Morris A. Cohen & Sang-Hyun Kim & Serguei Netessine, 2012. "Impact of Performance-Based Contracting on Product Reliability: An Empirical Analysis," Management Science, INFORMS, vol. 58(5), pages 961-979, May.
    12. B. Kirubakaran & M. Ilangkumaran, 2016. "Selection of optimum maintenance strategy based on FAHP integrated with GRA–TOPSIS," Annals of Operations Research, Springer, vol. 245(1), pages 285-313, October.
    13. Ma, Peng & Wang, Haiyan & Shang, Jennifer, 2013. "Contract design for two-stage supply chain coordination: Integrating manufacturer-quality and retailer-marketing efforts," International Journal of Production Economics, Elsevier, vol. 146(2), pages 745-755.
    14. Giannoccaro, Ilaria & Pontrandolfo, Pierpaolo, 2004. "Supply chain coordination by revenue sharing contracts," International Journal of Production Economics, Elsevier, vol. 89(2), pages 131-139, May.
    15. Jihai Zhang & Zhile Wang & Fan Ren, 2019. "Optimization of humanitarian relief supply chain reliability: a case study of the Ya’an earthquake," Annals of Operations Research, Springer, vol. 283(1), pages 1551-1572, December.
    16. Lars Hvam & Niels Henrik Mortensen & Jesper Riis, 2008. "Product Customization," Springer Books, Springer, number 978-3-540-71449-1, June.
    17. Ernst Fehr & Alexander Klein & Klaus M Schmidt, 2007. "Fairness and Contract Design," Econometrica, Econometric Society, vol. 75(1), pages 121-154, January.
    18. Li, Mingxing & Huang, George Q., 2021. "Production-intralogistics synchronization of industry 4.0 flexible assembly lines under graduation intelligent manufacturing system," International Journal of Production Economics, Elsevier, vol. 241(C).
    19. Caliskan-Demirag, Ozgun & Chen, Youhua (Frank) & Li, Jianbin, 2010. "Channel coordination under fairness concerns and nonlinear demand," European Journal of Operational Research, Elsevier, vol. 207(3), pages 1321-1326, December.
    20. Gérard P. Cachon, 2004. "The Allocation of Inventory Risk in a Supply Chain: Push, Pull, and Advance-Purchase Discount Contracts," Management Science, INFORMS, vol. 50(2), pages 222-238, February.
    21. Xu, Liming & Mak, Stephen & Brintrup, Alexandra, 2021. "Will bots take over the supply chain? Revisiting agent-based supply chain automation," International Journal of Production Economics, Elsevier, vol. 241(C).
    22. Hsueh, Che-Fu, 2014. "Improving corporate social responsibility in a supply chain through a new revenue sharing contract," International Journal of Production Economics, Elsevier, vol. 151(C), pages 214-222.
    23. Zachary A. Collier & Joseph Sarkis, 2021. "The zero trust supply chain: Managing supply chain risk in the absence of trust," International Journal of Production Research, Taylor & Francis Journals, vol. 59(11), pages 3430-3445, June.
    24. Selnes, Fred & Gonhaug, Kjell, 2000. "Effects of Supplier Reliability and Benevolence in Business Marketing," Journal of Business Research, Elsevier, vol. 49(3), pages 259-271, September.
    25. Wei, Lin & Chen, Menghan & Du, Shaofu & Zhang, Baofeng, 2022. "By-state fairness in selling to the newsvendor," Transportation Research Part E: Logistics and Transportation Review, Elsevier, vol. 159(C).
    26. C. R. Vishnu & Sangeeth P. Das & R. Sridharan & P. N. Ram Kumar & N. S. Narahari, 2021. "Development of a reliable and flexible supply chain network design model: a genetic algorithm based approach," International Journal of Production Research, Taylor & Francis Journals, vol. 59(20), pages 6185-6209, October.
    27. Arif, Asma & Minh Vu, Hieu & Cong, Ma & Hon Wei, Leow & Islam, Md. Monirul & Niedbała, Gniewko, 2022. "Natural resources commodity prices volatility and economic performance: Evaluating the role of green finance," Resources Policy, Elsevier, vol. 76(C).
    28. Yushan Hu & Ben G. Li, 2021. "The production economics of economics production," Journal of Economics & Management Strategy, Wiley Blackwell, vol. 30(1), pages 228-255, February.
    29. Qi Wang & Kebing Chen & Shengbin Wang & Xiaogang Cao, 2022. "Optimal decisions in a closed-loop supply chain: fairness concerns, corporate social responsibility and information value," Annals of Operations Research, Springer, vol. 309(1), pages 277-304, February.
    30. Kouhizadeh, Mahtab & Saberi, Sara & Sarkis, Joseph, 2021. "Blockchain technology and the sustainable supply chain: Theoretically exploring adoption barriers," International Journal of Production Economics, Elsevier, vol. 231(C).
    31. Teck-Hua Ho & Xuanming Su, 2009. "Peer-Induced Fairness in Games," American Economic Review, American Economic Association, vol. 99(5), pages 2022-2049, December.
    32. Sunder Kekre & Uday Rao & Samarth Sarthi & Jinxin Yi, 2004. "Risk-Based Integration of Strategic and Tactical Capacity Planning," Annals of Operations Research, Springer, vol. 132(1), pages 85-108, November.
    33. Dai, Bin & Nu, Yu & Xie, Xia & Li, Jianbin, 2021. "Interactions of traceability and reliability optimization in a competitive supply chain with product recall," European Journal of Operational Research, Elsevier, vol. 290(1), pages 116-131.
    34. Hsu, Bo-Xiang & Chen, Yi-Min & Chen, Li-An (Leann), 2022. "Corporate social responsibility and value added in the supply chain: Model and mechanism," Technological Forecasting and Social Change, Elsevier, vol. 174(C).
    35. José Luis Ferreras-Méndez & Oscar Llopis & Joaquín Alegre, 2022. "Speeding up new product development through entrepreneurial orientation in SMEs: The moderating role of ambidexterity," Post-Print hal-03603189, HAL.
    36. Cheng, Cong & Yang, Monica, 2019. "Creative process engagement and new product performance: The role of new product development speed and leadership encouragement of creativity," Journal of Business Research, Elsevier, vol. 99(C), pages 215-225.
    37. Rajesh Kr. Singh & Angappa Gunasekaran & Pravin Kumar, 2018. "Third party logistics (3PL) selection for cold chain management: a fuzzy AHP and fuzzy TOPSIS approach," Annals of Operations Research, Springer, vol. 267(1), pages 531-553, August.
    38. Fan, Di & Xiao, Chengyong & Zhang, Xiao & Guo, Yujuan, 2021. "Gaining customer satisfaction through sustainable supplier development: The role of firm reputation and marketing communication," Transportation Research Part E: Logistics and Transportation Review, Elsevier, vol. 154(C).
    39. Gwo-Hshiung Tzeng & Chi-Yo Huang, 2012. "Combined DEMATEL technique with hybrid MCDM methods for creating the aspired intelligent global manufacturing & logistics systems," Annals of Operations Research, Springer, vol. 197(1), pages 159-190, August.
    40. V. G. Venkatesh & Abraham Zhang & Eric Deakins & Sunil Luthra & S. Mangla, 2019. "A fuzzy AHP-TOPSIS approach to supply partner selection in continuous aid humanitarian supply chains," Annals of Operations Research, Springer, vol. 283(1), pages 1517-1550, December.
    41. Ma, Qiang & Mentel, Grzegorz & Zhao, Xin & Salahodjaev, Raufhon & Kuldasheva, Zebo, 2022. "Natural resources tax volatility and economic performance: Evaluating the role of digital economy," Resources Policy, Elsevier, vol. 75(C).
    42. Li, Zhong-Ping & Wang, Jian-Jun & Perera, Sandun & Shi, Jim (Junmin), 2022. "Coordination of a supply chain with Nash bargaining fairness concerns," Transportation Research Part E: Logistics and Transportation Review, Elsevier, vol. 159(C).
    43. Kaveh Asiaei & Nick Bontis & Raziye Alizadeh & Mehdi Yaghoubi, 2022. "Green intellectual capital and environmental management accounting: Natural resource orchestration in favor of environmental performance," Business Strategy and the Environment, Wiley Blackwell, vol. 31(1), pages 76-93, January.
    44. Wang, William Y.C. & Chan, Hing Kai, 2010. "Virtual organization for supply chain integration: Two cases in the textile and fashion retailing industry," International Journal of Production Economics, Elsevier, vol. 127(2), pages 333-342, October.
    45. Saghiri, Soroosh & Wilding, Richard, 2021. "On the effectiveness of supplier development programs: The role of supply-side moderators," Technovation, Elsevier, vol. 103(C).
    46. Jayani Ishara Sudusinghe & Stefan Seuring, 2020. "Social Sustainability Empowering the Economic Sustainability in the Global Apparel Supply Chain," Sustainability, MDPI, vol. 12(7), pages 1-18, March.
    47. Yousefi, Samuel & Mohamadpour Tosarkani, Babak, 2022. "An analytical approach for evaluating the impact of blockchain technology on sustainable supply chain performance," International Journal of Production Economics, Elsevier, vol. 246(C).
    48. Xu, Xiaoping & Choi, Tsan-Ming, 2021. "Supply chain operations with online platforms under the cap-and-trade regulation: Impacts of using blockchain technology," Transportation Research Part E: Logistics and Transportation Review, Elsevier, vol. 155(C).
    49. Olumide Emmanuel Oluyisola & Swapnil Bhalla & Fabio Sgarbossa & Jan Ola Strandhagen, 2022. "Designing and developing smart production planning and control systems in the industry 4.0 era: a methodology and case study," Journal of Intelligent Manufacturing, Springer, vol. 33(1), pages 311-332, January.
    50. James C. Cox & Cary A. Deck, 2005. "On the Nature of Reciprocal Motives," Economic Inquiry, Western Economic Association International, vol. 43(3), pages 623-635, July.
    51. Chang, Da-Yong, 1996. "Applications of the extent analysis method on fuzzy AHP," European Journal of Operational Research, Elsevier, vol. 95(3), pages 649-655, December.
    52. Kaveh Asiaei & Ruzita Jusoh & Omid Barani & Arash Asiaei, 2022. "How does green intellectual capital boost performance? The mediating role of environmental performance measurement systems," Business Strategy and the Environment, Wiley Blackwell, vol. 31(4), pages 1587-1606, May.
    53. Xinyi Zhou & Yong Hu & Yong Deng & Felix T. S. Chan & Alessio Ishizaka, 2018. "A DEMATEL-based completion method for incomplete pairwise comparison matrix in AHP," Annals of Operations Research, Springer, vol. 271(2), pages 1045-1066, December.
    54. Liu, Qian & Zheng, Lucy, 2016. "Assessing the economic performance of an environmental sustainable supply chain in reducing environmental externalitiesAuthor-Name: Ding, Huiping," European Journal of Operational Research, Elsevier, vol. 255(2), pages 463-480.
    55. Carter, Craig R. & Jennings, Marianne M., 2002. "Social responsibility and supply chain relationships," Transportation Research Part E: Logistics and Transportation Review, Elsevier, vol. 38(1), pages 37-52, January.
    56. Tony Haitao Cui & Jagmohan S. Raju & Z. John Zhang, 2007. "Fairness and Channel Coordination," Management Science, INFORMS, vol. 53(8), pages 1303-1314, August.
    57. Calic, Goran & Ghasemaghaei, Maryam, 2021. "Big data for social benefits: Innovation as a mediator of the relationship between big data and corporate social performance," Journal of Business Research, Elsevier, vol. 131(C), pages 391-401.
    58. Liu, Qiang & Zhao, Zhongwei & Liu, Yiran & He, Yao, 2022. "Natural resources commodity prices volatility, economic performance and environment: Evaluating the role of oil rents," Resources Policy, Elsevier, vol. 76(C).
    59. Leung, Eric K.H. & Lee, Carmen Kar Hang & Ouyang, Zhiyuan, 2022. "From traditional warehouses to Physical Internet hubs: A digital twin-based inbound synchronization framework for PI-order management," International Journal of Production Economics, Elsevier, vol. 244(C).
    60. Rameshwar Dubey & Nezih Altay & Constantin Blome, 2019. "Swift trust and commitment: The missing links for humanitarian supply chain coordination?," Annals of Operations Research, Springer, vol. 283(1), pages 159-177, December.
    61. Li, Qiu-xiang & Ji, Hui-min & Huang, Yi-min, 2022. "The information leakage strategies of the supply chain under the block chain technology introduction," Omega, Elsevier, vol. 110(C).
    62. Hsueh, Che-Fu, 2015. "A bilevel programming model for corporate social responsibility collaboration in sustainable supply chain management," Transportation Research Part E: Logistics and Transportation Review, Elsevier, vol. 73(C), pages 84-95.
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