Forging Pathways to Circular Economy Excellence: Integrating Industry 4.0 with Quality Management

: The convergence of industry 4.0 technologies with supply chain operations and sustainability initiatives has sparked interest in integrating supply chain quality management with these advancements, termed SCQM 4.0. A comprehensive literature review spanning 1998 to 2023, analyzing 232 papers, unveiled key trends, identiﬁed research gaps, and outlined a future research agenda for SCQM 4.0. The review culminated in the development of a comprehensive theoretical framework for SCQM 4.0 geared towards fostering sustainability within a circular economy framework, encompassing economic, social, and environmental dimensions. Notably, the study implies a rising enthusiasm for leveraging industry 4.0 tools such as the internet of things, blockchain, traceability systems, and smart packaging to enhance quality management within circular supply chain operations. Additionally, it proposes SCQM 4.0 strategies aimed at achieving holistic sustainability objectives in circular economies, underscoring implications for further scholarly inquiry in this dynamic ﬁeld. To promote supply chain quality management digitalization, supply chain stakeholders should analyze research gaps and develop practical implementation plans using the SCQM 4.0 framework. Additionally, exploratory qualitative investigations among organizations and industries should be conducted to identify essential components in sustainable SCQM 4.0.


Introduction
The growing interest in the circular economy (CE) reflects its compelling advantages for corporate organizations.As businesses increasingly prioritize sustainability and resource efficiency, the volume of studies on the CE has nearly tripled throughout the last five years [1].This shift in economic thinking promises to mitigate environmental degradation, enhance resilience, and drive innovation in corporate landscapes, offering significant long-term benefits [2] such as a 40% global emission reduction from key industry materials in 2050 [3] and a 20% increase in productivity [4].Advancing a CE aids in addressing resource scarcity and environmental issues [5] while enhancing a company's performance across economic, social, and environmental sustainability dimensions [6].In simple words, supply chain quality management (SCQM) is about implementing quality management principles in supply chains, serving as a company's approach to partnering with suppliers and customers to enhance quality standards [7].SCQM has transitioned from an activity-centric approach to a strategy-centric approach, working together and combining activities throughout the supply chain to detect and resolve quality concerns, with the ultimate goal of enhancing customer satisfaction and overall performance [8].The shift to a CE is essential for production firms to accommodate rising consumer demands for practical implications.Discoveries are made through examinations focused on stimulating thoughts and developing future theories in these fields; the field of strategic management is being investigated [14].Additionally, a comprehensive review is seen as an effective and verifiable approach that kickstarts theory development, recognizes principles, and reaches conclusions.Due to the potential for bias, the comprehensive review ensures a thorough, transparent, and reproducible evaluation of necessary research with great certainty [15].The main method for a comprehensive and structured comprehensive literature review involves three steps: selection, synthesis, and results [16].

Stage 1: Selection
Search strings SCQM: "Supply Chain Quality Management", "Supply Chain Management and Quality Management" Q4.0: "Quality 4.0", "Quality and Industry 4.0", "Quality and Digitalization", "Fourth Industrial Revolution and Quality", "Smart Manufacturing and Quality", "Smart Factory and Quality", "Cyber-Physical System and Quality", "Internet of things and Quality", "Industrial Internet and Quality", "Big data and Quality", "Blockchain and Quality" SC4.0: "Supply Chain 4.0", "Supply Chain and Industry 4.0", "Supply Chain and Digitization", "Fourth Industrial Revolution and Supply Chain", "Smart Manufacturing and Supply Chain", "Smart Factory and Supply Chain", "Cyber-Physical System and Supply Chain", "Internet of things and Supply Chain", "Industrial Internet and Supply Chain", "Big data and Supply Chain", "Blockchain and Supply Chain" SCQM4.0:"Supply Chain and Quality and Digitization", "Internet of Things and Supply Chain and Quality", "Supply Chain and Quality and Industry 4.0", "Fourth Industrial Revolution and Supply Chain and Quality", "Smart Factory and Supply Chain and Quality", "Smart Manufacturing and Supply Chain and Quality", "Industrial Internet and Supply Chain and Quality", "Big data and Supply Chain and Quality", "Cyber-Physical System and Supply Chain and Quality", "Blockchain and Supply Chain and Quality" Literature database Scopus, Elsevier, Emerald, Wiley Online Library (Wiley), Web of Science, Taylor and Francis, Springer, Ebsco and ProQuest, Inderscience, Informs PubsOnline, IEEE Xplore, and Google Scholar Time of publication Between 1998 and December 2023

Stage 2: Synthesis
Searching According to the predetermined criteria Screening Identification: consistency of identity across the database and summary Eligibility: examining the introduction and conclusion, including examining the entire document Analysis Analysis that describes and synthesizes themes

Stage 3: Results
Establish constructs for the SCQM 4.0 concept Build conceptual frameworks The comprehensive literature review protocol involved several key stages aimed at identifying and selecting relevant studies for inclusion in the final review (Figure 2).Firstly, the identification phase encompassed searching multiple databases and registers.Twelve databases, including Scopus, Elsevier, Emerald, Wiley Online Library, Web of Science, Taylor and Francis, Springer, Ebsco, ProQuest, Inderscience, Informs PubsOnline, and IEEE Xplore, along with Google Scholar, were queried.Additionally, registers such as SCQM, SC 4.0, QM 4.0, and SCQM 4.0 were explored, resulting in a total of 8497 records.In particular, SCQM4.0, an integration of industry 4.0 (I4.0) technologies, supply chain operations, and quality management for sustainability, involves leveraging digitalization and advanced technologies to enhance efficiency, transparency, and quality throughout the supply chain.Through the exploration of the literature on various keywords such as "Supply Chain and Quality and Digitization", "Internet of Things and Supply Chain and Quality", and others, organizations can integrate digital tools and platforms for end-to-end visibility, implement IoT sensors to monitor product conditions and ensure compliance with quality standards, align strategies with the objectives of the fourth industrial revolution to focus on innovation and resilience, establish smart factories equipped with IoT-enabled machines to monitor production processes, utilize big data analytics to extract actionable insights for data-driven decision-making, integrate cyber-physical systems to create a seamless connection between the physical and digital worlds, and deploy blockchain technology to establish transparent and immutable records of product provenance and quality.information.Afterward, the authors conducted a synthesis to determine patterns across the literature.Ultimately, the findings were analyzed in connection with the studyʹs aim, providing theoretical and practical implications.Discoveries are made through examinations focused on stimulating thoughts and developing future theories in these fields; the field of strategic management is being investigated [14].Additionally, a comprehensive review is seen as an effective and verifiable approach that kickstarts theory development, recognizes principles, and reaches conclusions.Due to the potential for bias, the comprehensive review ensures a thorough, transparent, and reproducible evaluation of necessary research with great certainty [15].The main method for a comprehensive and structured comprehensive literature review involves three steps: selection, synthesis, and results [16].

Stage 1: Selection
Search strings SCQM: "Supply Chain Quality Management", "Supply Chain Management and Quality Management"<break/>Q4.0:"Quality 4.0", "Quality and Industry 4.0", "Quality and Digitalization", "Fourth Industrial Revolution and Quality", "Smart Manufacturing and Quality", "Smart Factory and Quality", "Cyber-Physical System and Quality", "Internet of things and Quality", "Industrial Internet and Quality", "Big data and Quality", "Blockchain and Quality"<break/>SC4.0: "Supply Chain 4.0", "Supply Chain and Industry 4.0", "Supply Chain and Digitization", "Fourth Industrial Revolution and Supply Chain", "Smart Manufacturing and Supply Chain", "Smart Factory and Supply Chain", "Cyber-Physical System and Supply Chain", "Internet of things and Supply Chain", "Industrial Internet and Supply Chain", "Big data and Supply Chain", "Blockchain and Supply Chain"<break/>SCQM4.0: "Supply Chain and Quality and Digitization", "Internet of Things and Supply Chain and Quality", "Supply Chain and Quality and Industry 4.0", "Fourth Industrial Revolution and Supply Chain and Quality", "Smart Factory and Supply Chain and Quality", "Smart Manufacturing and Supply Chain and Quality", "Industrial Internet and Supply Chain and Quality", "Big data and Supply Chain and Quality", "Cyber-Physical System and Supply Chain and Quality", "Blockchain and Supply Chain and Quality" Literature database Scopus, Elsevier, Emerald, Wiley Online Library (Wiley), Web of Science, Taylor and Francis, Springer, Ebsco and ProQuest, Inderscience, Informs PubsOnline, IEEE Xplore, and Google Scholar Before screening, duplicate records were removed across databases and sub-topics, resulting in the elimination of 5156 records.Moreover, records marked as ineligible by automation tools were removed, amounting to 568 records.The inclusion criteria stipulated English peer-reviewed journal publications and conference proceedings only.
During the screening phase, the remaining records (n = 2773) underwent title and abstract screening, resulting in the exclusion of 2045 records.Among these, 21 records lacked abstracts, while 1803 were deemed irrelevant to the contexts of the supply chain, quality, and technologies.Additionally, book reviews and commentaries accounted for the exclusion of 221 records.
Following screening, 728 records were sought for retrieval, with 8 records not retrieved due to inaccessibility.Of the retrieved records, 700 were assessed for eligibility.Records were excluded if they were not related to circular economy contexts (n = 353), supply chain quality management (n = 65), or industry 4.0 (n = 50).
Ultimately, 232 studies met the inclusion criteria and were included in the final review.These studies spanned various sub-topics, with 80 focusing on SCQM, 71 on SC 4.0, 27 on QM 4.0, and 54 on SCQM 4.0.This comprehensive literature review protocol ensured the thorough identification and selection of relevant studies for the final review, facilitating a comprehensive analysis of the research landscape on the intersection of circular economy, supply chain quality management, and industry 4.0.In total, 232 articles related to SCQM 4.0 were selected and classified as relevant in the literature review based on the article identification, screening, and inclusion process, as illustrated in Figure 2.Moreover, the software program Bib Excel 2017 processes and analyzes large sets of social longitudinal research data due to its adaptability and ability to integrate with various tools, including Microsoft Excel 2402, Pajek 5.18, and Gephi 0.10.0 [17].Bib Excel provides support in preparing data for in-depth network study.According to the analysis of 54 out of 232 articles (represented in Figure 3), despite a relatively smaller number of studies compared to those on SCQM, SC4.0, and Q4.0, SCQM 4.0 holds significant potential for research and is of great interest to a wide range of academicians.The term "SCQM 4.0" can be understood to represent a combination of technological advancements and industry trends, including the internet of things (IoT), I4.0, supply chain management, and quality management.These concepts are keywords utilized to identify SCQM 4.0.In total, 232 articles related to SCQM 4.0 were selected and classified as relevant in the literature review based on the article identification, screening, and inclusion process, as illustrated in Figure 2.Moreover, the software program Bib Excel 2017 processes and analyzes large sets of social longitudinal research data due to its adaptability and ability to integrate with various tools, including Microsoft Excel 2402, Pajek 5.18, and Gephi 0.10.0 [17].Bib Excel provides support in preparing data for in-depth network study.According to the analysis of 54 out of 232 articles (represented in Figure 3), despite a relatively smaller number of studies compared to those on SCQM, SC4.0, and Q4.0, SCQM 4.0 holds significant potential for research and is of great interest to a wide range of academicians.The term "SCQM 4.0" can be understood to represent a combination of technological advancements and industry trends, including the internet of things (IoT), I4.0, supply chain management, and quality management.These concepts are keywords utilized to identify SCQM 4.0.

Analysis of the Literature Review Results
According to Figure 3, the concepts of supply chain quality management (SCQM), supply chain 4.0 (SC 4.0), quality management 4.0 (QM 4.0), and supply chain quality management 4.0 (SCQM 4.0) have evolved over time, reflecting the changing landscape of supply chain and quality management practices.SCQM emerged as a significant concept in 1998 and has since garnered increasing attention, particularly in recent years, with a notable rise in publications from 2014 onwards.SCQM focuses on the integration of quality management principles within supply chain processes to enhance overall performance and customer satisfaction.Similarly, SC 4.0 and QM 4.0 have gained prominence in the literature, reflecting the integration of industry 4.0 technologies and principles into supply chain and quality management practices.The intersection of these concepts is evident in SCQM 4.0, which represents the integration of quality management and industry 4.0 technologies within supply chain operations.The increasing publication trends for SC 4.0, QM 4.0, and SCQM 4.0 highlight the growing emphasis on leveraging advanced technologies and digitalization to optimize supply chain processes and quality management practices in the contemporary business environment.
Furthermore, Figure 4 depicts the quantity of SCQM papers in each database from the antecedent literature.Although the search encompassed various databases, the articles predominantly focused on a few databases, including Emerald, Elsevier, and Taylor and Francis.Emerald published the most articles on SCQM, followed by MDPI, Springer, and Taylor and Francis, where the majority of the articles were on SCQM and SC4.0, while the articles on SCQM4.0 were shown to increase across the databases.According to previous research, a range of industries have been studied in relation to SCQM (illustrated in Figure 5).The current discovery highlights a small number of empirical studies that require further examination by the academic community to validate and confirm the accuracy of conceptual models, as suggested by Frederico, et al. [18], Sony, et al. [19], Sampaio, et al. [20], and Fernandes, et al. [21].According to Figure 5, the majority of empirical research studied was derived from automotive and manufacturing (16%), followed by multisectional (15%) sectors.Interestingly, the distribution of research across the manufacturing and service industries was relatively even, with service industries accounting for 41% to 59% of the surveyed industries, suggesting that academics place a significant emphasis on research related to service sectors.The studies on QM4.0 were comparatively less across different industries.Additionally, Figure 6 displays the number of articles about SCQM in various journals.Several academic journals, such as "The TQM Journal" and the "International Journal of Quality and Reliability Management", have presented a wide range of articles on SCQM 4.0.These publications have showcased thorough research on SCQM 4.0, as seen in "Industrial Management and Data Systems" and "Food Control".Furthermore, Figure 6 shows that studies on SCQM and SC4.0, followed by SCQM4.0,appeared the most in the majority of the journals.
According to the graph, there was an anticipated increase in research activity from 2020 onwards, with notable publications like "The TQM Journal", "Industrial Management and Data Systems", "Food Control", "International Journal of Quality and Reliability Management", "International Journal of Production Economics", and "Sustainability" concentrating on the topic (Figure 6).According to Figure 7, the majority of research methodologies used in the antecedent literature on SCQM were empirical studies, comprising 53% of the publications.These studies include surveys (29%) and case studies (24%).The majority of these methodologies aimed to provide insights into how supply chain management, quality management, and digital transformation are implemented in multiple industries by collecting data through questionnaires, surveys, and case studies of firms in different industries.Remarkably, 19% of the publications put forward novel frameworks for techniques, tools, and practice integration.Literature reviews contributed 7% of the total quantity of articles, facilitating theory contribution and novel directions for future studies.The frequencies of empirical study techniques, including case studies and surveys, were comparable, with 19% and 23.5%, respectively.A mere 4% of articles employed qualitative and quantitative methodologies.As shown in Figure 7, we found that content analyses and mixed methods were less applied in the studies on SCQM, and the review method was also less applied in the studies on SCQM4.0Meanwhile, case studies, surveys, and conceptual methods were most applied in the studies on QM4.0.Carranza [22] proposed the following two strategies to enhance the precision and reliability of study results: (1) knowledge-based/directional and (2) data-based/quantitative.

Thematic Synthesis and Analysis
The research on traceability technology trends has identified several applications within supply chain management.Bhatt, et al. [23] and Olsen and Borit [24] examined traceability technologies' broader applications.Specifically, scholars have investigated the application of RFIDs in traceability [25], RFIDs with PDA and barcodes [26], "gapless" RFID-based traceability [27], RFID technology's applications in logistics [28], and anticounterfeit operations [29].The role of the IoT and EPC global standards in enhancing traceability was explored by Furdik, et al. [30], emphasizing interoperability and data exchange.Óskarsdóttir and Oddsson [31] specifically investigated traceability challenges in cold supply chains, emphasizing temperature control.Through traceability, while Wang, et al. [32] and Xiao, et al. [33] focused on ensuring product quality, ensuring security and safety was addressed by Liu, et al. [34].Moreover, other perspectives of traceability technologies were researched: traceability's value to customers [35], implementation require-

Thematic Synthesis and Analysis
The research on traceability technology trends has identified several applications within supply chain management.Bhatt, et al. [23] and Olsen and Borit [24] examined traceability technologies' broader applications.Specifically, scholars have investigated the application of RFIDs in traceability [25], RFIDs with PDA and barcodes [26], "gapless" RFIDbased traceability [27], RFID technology's applications in logistics [28], and anti-counterfeit operations [29].The role of the IoT and EPC global standards in enhancing traceability was explored by Furdik, et al. [30], emphasizing interoperability and data exchange.Óskarsdóttir and Oddsson [31] specifically investigated traceability challenges in cold supply chains, emphasizing temperature control.Through traceability, while Wang, et al. [32] and Xiao, et al. [33] focused on ensuring product quality, ensuring security and safety was addressed by Liu, et al. [34].Moreover, other perspectives of traceability technologies were researched: traceability's value to customers [35], implementation requirements, consistency, data security and big data expertise [36], and technology challenges in handling the heterogeneous nature of the supply chain [37].
According to recent research on SCQM 4.0, there is a growing trend towards utilizing blockchain technology to mitigate risks and enhance supply chain quality management, e.g., [38].Blockchain, a groundbreaking and transformative technology, is revolutionizing the agricultural industry (e-agriculture).The integration of blockchain technology has shown significant potential in various business applications, particularly in supply chain management [39].The incorporation of blockchain technology can enhance data collaboration and trust among various stakeholders due to its inherent qualities, including transparency, resistance to censorship, distributed ledger technology (DLT), and smart contract functionality [40], and can create top-notch data infrastructure [41].Blockchains were used in an intelligent SCQM framework [42], supply chain traceability systems integrating blockchain and IoT technology [43], and a supply chain traceability system utilizing HACCPs (hazard analysis and critical control points), blockchains, and the IoT [44].Additionally, the adoption of blockchains was studied to evaluate the practical implications and effectiveness of blockchain solutions in supply chain operations.While Kamath [45] analyzed the implementation of a prototype project utilizing blockchain technology and a trial deployment, Galvez, et al. [46] and Tripoli and Schmidhuber [40] discussed challenges associated with implementing blockchains and smart contracts in supply chain management.The use of blockchain technology will be applied in supply chain operations management, which is a viable and promising area of implementation [47].
Recently, more research has been dedicated to integrating blockchain technology with other advanced technologies [48].The IoT represents a groundbreaking technology that is transforming various industries, including QM.Moreover, the IoT enables seamless communication between people and objects, as well as the automated coordination of "things" while they are stored or transported between different entities [49].For example, Puligundla, et al. [50] contributed to the exploration of carbon dioxide sensors, focusing on different types and their applications in smart packaging systems.To monitor the history of temperature variations over time, while Brizio and Prentice [51] and Gao, et al. [52] investigated the use of photochromic time-temperature indicators (TTIs), Zavala, et al. [53] and Lorite, et al. [54] delved into the development of smart time-temperature indicators.Moreover, Tsang,et al. [55] explored the utilization of IoT technology for item monitoring within smart packaging systems, emphasizing enhanced tracking and traceability functionalities.Regarding sustainability initiatives, Fang, et al. [56] and Poyatos-Racionero, et al. [57] contributed to research on intelligent packaging solutions designed to minimize waste through innovative design and material selection strategies.The IoT is experiencing rapid growth and is the focus of increasing attention in both academic and industrial circles, offering enhanced visibility, agility, and adaptability in solving multiple quality problems within the supply chain [49].
The current literature also provides a comprehensive overview of supply chain IoT implementation and frameworks, detailing various contributions from researchers in the field.In terms of implementation, several studies have explored the use of the IoT for monitoring processes to ensure quality [58] and safety [59] within supply.Specific areas of focus include monitoring cold supply chains using the IoT [60], cargo monitoring systems leveraging the IoT for product quality assurance [61], and monitoring cold supply chains using the IoT and cloud computing [62].Additionally, Liu, et al. [63] and Luo, et al. [64] contributed to the development of intelligent IoT-based tracking systems for cold chains and traceability in duck products, respectively.Apart from the IoT, RFID and sensor-based systems have been developed for the real-time inventory tracking of critical temperatures [54] and for the tracking of refrigerated distribution chains [65].Regarding frameworks, Pang, et al. [66] suggested a framework prioritizing value in IoT technologies, while Verdouw, et al. [67] developed an architecture for logistics information systems based on the IoT.In supply chains, specific fields have been studied, such as planning with the IoT [68], virtualization [69], and hierarchical data architecture for sustainability [70].With the use of the IoT, scholars have developed an assessment technique for producing [71] and monitoring cold supply chains [60].
Despite advancements in security technology, fundamental flaws continue to pose significant risks to privacy and security [72].The current security and privacy measures are not adequate for the IoT due to its decentralized network structure and the limited resources of mobile devices [73].Challenges in the widespread adoption of the IoT include the significant cost of investing in IoT technology [74], the extensive data produced by the IoT requiring strong software and hardware, and a secure environment to efficiently handle and analyze it.However, the lack of standardization in IoT systems [72] creates barriers for companies to adopt IoT technology.Due to the extensive variety of products, a situation-by-situation implementation strategy is frequently adopted as a result of the absence of standardization, which can lead to inefficiencies and inconsistencies (Badia-Melis et al. 2018) [75], and the lack of adequate government oversight and subpar internet infrastructure are significant contributors to the complexity of the situation [76].

A Conceptual Framework for Sustainable SCQM 4.0
The research seeks to develop a definition of SCQM 4.0 that can serve as a guiding framework for its construction in the following section: "Supply chain quality management 4.0 is a holistic and transformative approach to supply chain and quality management where companies are applying breakthrough I4.0 technologies to their operations in the industry network of companies for higher quality products and services, streamlining processes and supply chain relationships to achieve high levels of customer satisfaction and benefit significant strategy for all stakeholders in the supply chain." This study aims to propose a SCQM 4.0 conceptual framework and integrate the components of I4.0 technologies, supply chain operations, and quality management to achieve sustainability in a CE.The focus is on simultaneously achieving economic, social, and environmental sustainability through this integrated approach.The components were generated using the literature review method.SCQM incorporates two key elements of sustainable supply chain operations and quality management practices into its conceptual framework.The text describes two interrelated components of a company's operations: (1) infrastructure practices and (2) sustainable performance, which encompasses three sustainability components: economic profitability, social engagement, and environmental respect.Figure 8 provides a comprehensive conceptual framework for the study, including infrastructure practices, the adoption of I4.0 technologies, supply chain operations, and supply chain sustainability, which is further elaborated upon in the following sections.2 displays the significant infrastructure practices present in SCQM 4.0, the first component in the conceptual framework, which includes technology systems, personnel and workplace management, collaboration, company principles, understanding, and management.To illustrate this, the personnel and workplace management suggest that the business structure, human resources strategy, workplace environment, and capability improvement are significant factors in the implementation of SCQM 4.0 [77].Furthermore, the company principles play a key role by highlighting the collection of norms, beliefs, and values that are mutually held by employees within a company when embracing innovative I4.0 technologies, along with the backing of senior management for these disruptive technologies to enhance supply chain quality [78].
tainable supply chain operations and quality management practices into its conceptual framework.The text describes two interrelated components of a company's operations: (1) infrastructure practices and (2) sustainable performance, which encompasses three sustainability components: economic profitability, social engagement, and environmental respect.Figure 8 provides a comprehensive conceptual framework for the study, including infrastructure practices, the adoption of I4.0 technologies, supply chain operations, and supply chain sustainability, which is further elaborated upon in the following sections.

Technology system
To facilitate the adoption of disruptive technologies, IT resources and capabilities must be accessible for development, implementation, and continuous management.This encompasses the necessary infrastructure for storing and analyzing extensive amounts of data.
[ [79][80][81] Personnel and workplace management The organizational framework, HR approach, work environment, and training for SCQM 4.0 will focus on integrating the latest devices.[82,83] Collaboration Effective communication throughout various levels is essential when considering the wide-ranging impacts of SCQM 4.0.This requires active collaboration, sharing accurate information and policies, and engaging in joint decision-making.Ultimately, coordination entails a collective approach that results in mutual benefits.
[  The SCQM 4.0 disruptive technologies in Table 3 involve the integration of 13 cuttingedge innovations to enhance product quality within the supply chain.Such devices necessitate a robust technological system for their development, initial implementation, and ongoing maintenance to ensure their optimal functioning.The continuous research and advancements in I4.0 and its devices are a major influence on social and economic advancements in different fields.In recent years, various initiatives have been implemented, building upon advancements in technology.Advancements in the digital, biotechnological, and physical domains have been progressing quickly and significantly improving.The core technologies of I4.0 have been integral to these developments.Therefore, these technologies have significant impacts on new product development, quality improvement, and operations management, which will improve supply chain quality management [92,93].4 summarizes the supply chain operations in SCQM 4.0 that are defined and discussed in the current literature.In order to effectively implement technologies, employees must strategically participate in continuous training provided by organizations.The necessary skills for SCQM 4.0 encompass technical elements as well as transferable skills like adaptability, critical thinking, creativity, teamwork, and knowledge sharing [141].In addition to a transformational leadership approach, it is essential to also focus on incorporating elements of learning and innovation.The current forms of transformational leadership consist of idealized influence, inspirational motivation, intellectual stimulation, and individualized consideration [142].The difficulty arises in connecting diverse systems, platforms, and standards due to the absence of standardization in IoT systems.Fast detection sensors that can withstand challenging conditions are necessary [143].Anyway, the resistance to change of stakeholders during technology implementation in organizations and business processes hinders the technological adoption and resulting challenges for SCQM 4.0 implementation.Hence, the commitment from senior leadership to facilitate these changes is pivotal.Furthermore, the effectiveness of SCQM 4.0 hinges on the integration of technologies into corporate tactics.Top management backing and a leadership style focused on knowledge are required.A lack of standardization leads to a fragmented approach to implementation because of the wide variety of products in use [75].In summary, further obstacles come about because of insufficient government supervision and ineffectual internet infrastructure [76].While the enhancement of regulatory frameworks and standards can be achieved via collaboration between the private and public sectors, the vital aspect of infrastructure development, particularly internet access, necessitates investment [144].Initiatives aimed at enhancing capacity and advocacy endeavors directed at policymakers have the potential to empower parties and enhance awareness, thereby supporting the successful adoption of SCQM 4.0 and enhancing the performance of supply chains [145].

Transparency
The degree to which stakeholders correctly gather and capture information from every part of the supply chain, including visibility and sharing this data internally and externally, as needed for disclosure.[112,146] Integration Integration involves combining all the different parts together and coordinating the needs, ideas, and activities of chain members to enhance competitive advantages across strategic, tactical, and operational levels.[145,147,148] Interoperability The capacity of technologies to share and utilize data; the capacity of systems to exchange data, utilize information, and access each other's functions.[84,85,149] Collaboration Collaboration involves teaming up with others towards a specific goal or objective [150].All participants in collaborative supply chains must adhere to the agreed strategies, regardless of their size, role, or position [151].[144,147,148] Performance measurement The measurement of the effectiveness of the steps in the supply chain operations is reflected through the ratio of perfect order and defect rates.[152][153][154] Efficiency A firm's efficiency is determined by how well its operations utilize various resources, including financial, human, technological, and physical resources.
[ 145,147] Flexibility The firm's ability to effectively handle uncertainties and customer expectations with the collaboration of key suppliers and customers without incurring high costs, time delays, or performance setbacks.

Responsiveness
The supply chain's capability to efficiently meet customer demands or adapt to market changes in a timely manner.[148,156,158] 4.4.Economic, Social, and Environmental Sustainability in SCQM 4.0 The concept of the circular economy (CE) had a surge in prominence throughout the 1960s.According to Preston [159], industrial ecology (IE), which serves as the foundation of the CE, initially originated in the 1970s.The CE refers to a theoretical framework of economic circulation that aims to minimize resource use within closed-loop production and consumption systems.According to a number of studies [160], it is widely acknowledged that the theoretical and empirical underpinnings of the CE are mostly rooted in IE theory.The term CE, similar to IE, denotes an analogy that draws a comparison between industrial and natural systems.The objective of this approach is to enhance the efficiency of matter and energy movement with the aim of minimizing the depletion of natural resources and environmental emissions, which entails transitioning towards a state of closed-loop supply chain [161].Berlin, et al. [162] investigated the interconnectedness of open-and closed-loop supply chains in a CE, thereby advocating for the adoption of closed-loop systems to achieve resource sustainability.Regarding the most important factor in sustainability, carbon emissions, Li, et al. [163] and Abbasi and Erdebilli [164] proposed a necessity-based optimization approach and explored the resilience of green closed-loop supply chains under the uncertainty of carbon policies, respectively.Scholars have also discussed critical factors in closed-loop supply chains, such as the strategic dimensions of pricing and advertising decisions in direct sales [165] and hybrid meta-heuristic algorithms tailored for dual-channel networks [166].Moreover, the CE is mostly focused on the examination of the movement of matter, energy, and information within both natural and industrial systems.Interactions between industrial and natural systems are examined by IE at several levels, including the corporate, firm, regional, and higher levels.To achieve success in a CE, it is necessary to exert efforts at three levels [167].At the micro level, the product-focused strategy is linked to cleaner manufacturing, life-cycle management, environmentally friendly design, and several stakeholders, including the suppliers, producers, customers, and designers [168].The eco-industrial and eco-agricultural park or system strategy at the meso level encompasses the industrial symbiosis (IS) concept as a waste-trading network that is structured around clustered companies engaged in the exchange of by-products and the sharing of standardized services or infrastructures [159].However, this approach can additionally include alternative forms of inter-organizational environmental management [169].The service or functional economy, at the macro level (local, regional, or national level), focuses on the use of services as by-products [170] and is connected to various kinds of dematerialization and rematerialization [171].The IS concept is expanded to include urban symbiosis, which is predicated on the synergistic prospects that emerge from geographical closeness facilitated by the exchange of physical resources for the benefit of both the environment and the economy [172].
Multiple scholars have established different CE frameworks, some of which are incorporated in the research following the number of approaches, such as 3R (i.e., reduce, reuse, and recycle) [173], 4R, 5R, 6R, 10R, or the ReSOLVE framework [174].According to [175], the spectrum of circular economy strategies encompasses several frameworks, from the 3R framework (which includes reduce, reuse, and recycle) to the 6R framework (which includes repair, reduce, reuse, recycle, redesign, and remanufacture).The body of scholarly work pertaining to the CE has seen significant expansion over the last decade, mostly attributed to its capacity to provide viable alternatives for sustainable production, with a particular focus on small-and medium-sized enterprises [176].

Drivers for Circular Economy Adoption
Comprehending the factors that influence the CE is crucial as it has a significant role in driving development in developing nations [177].Stakeholders engage in the CE for a variety of reasons, including resource scarcity, environmental degradation, favorable business opportunities, regulatory compliance, consumer pressure, customer collaboration, and enhanced firm performance [161].The primary motivations for the adoption of CE initiatives are categorized into two types: internal and external [177].
According to Tan, et al. [178], the possibility of higher revenue is what drives organizations' internal pressure to adopt the CE.The researchers identified five primary internal drivers, namely, advantages to the economy and environment, increased resilience and supply security, new and improved customer relationships, and corporate values, approaches, and ambitions.Moreover, it was emphasized that the attainment of the advantages of a CE necessitates the presence of two key external forces: market force and coercive pressure.Several factors have been identified by numerous researchers as the driving forces behind the CE, including lowering expenses in manufacturing [179], a diversified and customized offering, increased brand safety and commitment [178], a rise in revenue from recovering waste products, and increasing rivalry from low-cost nations [180].
Additionally, there is a growing trend in society towards environmentally friendly consumption, accompanied by an increase in consumers' environmental knowledge and their preference for sustainable products [181].Furthermore, sustainability-minded entrepreneurs strive to combat the excessive use of natural resources, including degradation issues [182], and advocate for innovation as a crucial catalyst for achieving sustainability [183].As a result, the CE approach offers a robust strategic framework that facilitates the shift towards environmentally sustainable production and consumption [184].
The three main factors of sustainable supply chain management in the CE are economic, social, and environmental sustainability [185].Sustainable SCQM 4.0 enables supply chain operations to generate profits and value for their stakeholders, improve the well-being of the employees and the communities in which the business operates, and reduce the adverse environmental impacts in supply chain operations [5].Thus, the progression towards the achievement of the three sustainability pillars becomes achievable in the adoption of SCQM 4.0 with the empowerment of I4.0 technologies [186].
Economic sustainability attained in a CE through SCQM 4.0, such as production efficiency and business model innovation, can expand a firm's production capacity and enable higher profitability and market expansion [187].The indicators of economic sustainability in the CE consist of (1) product and process enhancement and (2) market development opportunities.Firstly, by incorporating sustainable product design principles, firms can develop products that appeal to environmentally conscious consumers in a CE [138].Such products that are environmentally friendly support product brand reputation, increased customer loyalty, and higher sales volumes [188].Moreover, sustainable production process improvements in a CE, such as energy-efficient manufacturing and waste reduction, increased productivity, and optimized resource utilization, can result in substantial production cost reduction [189].For instance, energy-efficient buildings can reduce energy consumption and lower utility bills [190], while waste reduction and recycling initiatives can minimize waste disposal costs [191].In addition, products that emphasize eco-friendly, socially responsible, or ethically sourced factors socially motivate the consumer's willingness to pay premium prices that align with their perceived values [188].By embedding sustainability into business operations, firms can achieve long-term cost savings and improve their economic performance.Secondly, sustainable performance can facilitate market expansion by unlocking new customer segments and business opportunities.As sustainability gains prominence in consumer preferences, businesses that prioritize sustainability can tap into niche markets and attract new customers [192].Additionally, sustainability-oriented partnerships and collaborations can open doors to untapped markets, fostering growth and diversification [193].By aligning their strategies with sustainability, companies position themselves favorably to expand their market share and seize emerging opportunities.
Social sustainability in the CE underscores the importance of social responsibility in sustainable practices and demonstrates how they can contribute to societal progress, which is related to individual knowledge, skill enhancement, and ethical business practices [194].Social sustainability indicators focus on individual well-being, which directly influences the livelihood of individuals within organizations and communities [195].In knowledge and skill enhancement, sustainable performance encourages organizations to provide skill enhancement, career progression, and sustainable business practices that create an organizational culture that nurtures employees' talents, fostering job satisfaction and overall well-being [196].More importantly, sustainable practices often involve investments in workforce training for employee education and skill development.By providing training and educational opportunities, companies contribute to the personal growth and professional advancement of their employees [2].This not only enhances individual well-being but also cultivates a knowledgeable and skilled workforce that can drive innovation and productivity.Furthermore, ethical business practices in the CE often leverage employee awareness and initiatives on environmentally friendly operational protocols [197] through the firm's endeavors in renewable energy, environmental conservation, and socially responsible activities, which promote social inclusion that improves livelihoods [2].In addition, these practices emphasize the production of safe products and processes that prioritize consumer health and safety [6].By adhering to rigorous quality standards, ethical sourcing, and responsible manufacturing practices, businesses build trust and contribute to the overall well-being of consumers [198].Environmental respect and responsible resource management in a CE are fundamental aspects of sustainable performance that underscore the importance of integrating environmental considerations into a firm's sustainable performance strategies [199].In SCQM 4.0, environmental sustainability involves managing inputs, handling waste, and preserving resources.By examining these three components carefully, we aim to highlight how companies can positively impact the environment and underscore the importance of integrating environmental considerations into sustainable business strategies.The first crucial aspect of environmentally conscious and sustainable performance is the efficient management of input resources.This entails responsibly utilizing and preserving resources in all aspects of a company's activities, aiming to reduce waste and optimize resource efficiency [200].Input management emphasizes environmentally friendly operational practices from three perspectives: (1) companies prioritize the efficient use of energy, water, and raw materials to reduce consumption, streamline production processes, and minimize waste [201] and (2) sustainable sourcing entails implementing practices that prioritize environmental responsibility when selecting suppliers.This involves partnering with suppliers who adhere to environmentally friendly standards and practices [197].To mitigate the adverse ecological effects of the production process, this approach prioritizes the procurement of inputs and materials in a way that minimizes harmful practices, such as deforestation or habitat destruction.[195].Lastly, (3) businesses may conduct a comprehensive analysis of the environmental effects of their products or services from start to finish, including raw material extraction, production, use, and disposal through a process known as life-cycle assessment [202].Through this process, companies can pinpoint areas where they can make adjustments to reduce their environmental impact and make data-driven decisions to minimize their overall ecological footprint [203].Furthermore, efficient waste management is crucial for eco-friendly and long-lasting activities, as it minimizes contamination, preserves materials, and follows CE guidelines [189].Waste handling emphasizes environmentally friendly operational practices in three perspectives, i.e., waste reduction, recycling and reuse, and hazardous waste management.Sustainable companies use strategies like process optimization, product redesign, and material substitution to minimize waste generation and decrease waste management costs, aiming to decrease their environmental impact and enhance sustainability [2].Encouraging recycling and reusing practices can effectively decrease landfill waste and preserve resources.Businesses are essential in promoting a sustainable economy by implementing recycling programs and finding innovative ways to reuse materials [200].In order to ensure environmentally responsible and sustainable performance, firms should properly manage and dispose of hazardous materials to prevent pollution and safeguard ecosystems and human health [204].It is crucial to adhere to regulatory guidelines, establish proper storage and disposal methods, and encourage environmentally conscious waste management practices in the handling of hazardous waste [197].Thirdly, the protection and conservation of natural resources and ecosystems are fundamental components of environmentally responsible and sustainable practices [205].There are three perspectives: biodiversity conservation, environmental stewardship, and sustainable performance.Businesses that prioritize sustainability focus on safeguarding and revitalizing biodiversity by limiting habitat destruction, collaborating with conservation initiatives, and adopting environmentally responsible land management techniques [206].Preserving biodiversity is crucial for the resilience of ecosystems and the long-term health of the planet [199].Furthermore, environmental stewardship involves implementing measures to reduce emissions, minimize water and air pollution, and adopt sustainable land use practices [207].To achieve sustainable performance, businesses must actively participate in global initiatives aimed at reducing the impact of climate change [194], such as lowering emissions, switching to renewable energy sources, and adopting carbon offset measures [190].

Findings
The research introduces a SCQM 4.0 conceptual framework incorporating I4.0 technologies, supply chain operations, and quality management to support economic, social, and environmental sustainability in a CE.The research emphasizes the significance of setting up technology systems, personnel and workplace management, collaboration, company principles, understanding, and management to effectively implement disruptive technologies.Failure to build this foundation may result in the ineffective execution of technologies for sustainable supply chain operations.Furthermore, utilizing 4.0 technologies enhances product and service quality management, addresses supply chain trust issues, and improves resource allocation efficiency and production process optimization.SCQM 4.0 strengthens manufacturing operations with I4.0 disruptive technologies that maximize outputs and create high-quality products and services whilst utilizing minimum resources [208].
From the literature, our findings about the significance of integrating I4.0 with supply chain management to attain economic, social, and environmental sustainability are supported by numerous studies.Chen and Paulraj [209] and Pagell and Wu [210] made significant contributions to the advancement of theoretical concepts and metrics in supply chain management, emphasizing the need for a holistic framework that includes aspects of technologies and businesses.More studies have highlighted the emergence of I4.0 through a framework for sustainable supply chain management 4.0 [211] and conceptual and maturity frameworks for SCQM 4.0 [130].Sarkis, et al. [212] also placed a significant emphasis on the organizational aspects of sustainable supply chain management, which is aligned with our research's emphasis on human resources and cooperation.Moreover, the role of digital supply chain twins in disruption management is discussed by Ivanov and Dolgui [213], corroborating our research outcomes about the importance of technological systems and resource allocation.Overall, our study extends the understanding of SCQM 4.0, underlining its potential to contribute to the CE.

Limitations and Future Research Directions
Despite its valuable contributions, this study has shortcomings.

•
Firstly, it broadly focuses on research objectives instead of a specific industry, potentially limiting its applicability to other industries.It is important to note that the study did not examine SCQM 4.0 toward the CE across sectors.Different industries have unique characteristics, challenges, and opportunities that could impact the effectiveness of sustainable SCQM 4.0 practices on supply chain quality.Furthermore, SCQM 4.0 is an emerging concept that might impede a more thorough comprehension of its impact on the CE in different industries.

•
Secondly, the study overlooks the influence of regulations and institutional factors on the implementation and outcomes of SCQM 4.0 practices.Variations in regulatory and institutional environments between countries and regions may affect firms' ability to adopt SCQM 4.0 practices and attain sustainable performance.Moreover, under uncertain conditions, regulatory frameworks are constantly changing to address emerging issues, including climate change and social responsibility; companies are confronted with more confusion over their obligations to comply with regulations and adhere to standards, which in turn affects their business operations.
Furthermore, this study also sheds light on the avenues for future research on sustainable SCQM 4.0.

•
This research advocates for the further exploration of the relationships between quality management, supply chain management, and I4.0 technologies to enhance sustainable supply chain performance, focusing on economic, social, and environmental sustainability.

•
Additionally, future research should delve into the synergistic integration of human creativity and AI within the framework of industry 5.0.This expanded scope will facilitate a holistic comprehension of the evolving industrial landscape, marked by the collaborative interplay between humans and machines, and its impact on sustainable supply chain performance across economic, social, and environmental spheres.

•
Through the proposed SCQM 4.0 conceptual framework, supply chain operators and relevant stakeholders should perform research gap assessments and actionable deployment strategies to accelerate the digitalization of supply chain quality management.

•
In addition, exploratory qualitative studies should be carried out in different organizations and industry sectors to explore any potential key constructs that enhance the identification of sustainable SCQM 4.0.

Discussion
From the findings about SCQM 4.0 conceptual frameworks and their essential elements for effective implementation, this research provides benefits for stakeholders and researchers in several sectors.Supply chain operators can attain sustainability, improve performance quality, and optimize resource allocation for their business by integrating I4.0 technology and sustainable initiatives into their supply chain activities.Furthermore, researchers can use the proposed future study areas to investigate the correlation between quality management, supply chain management, and I4.0 technologies in order to improve supply chain performance and sustainability.By working together and implementing strategic plans, firms can expedite the process of digitizing supply chain quality management, leading to enhanced efficiency, productivity, and sustainability results.

Figure 2 .
Figure 2. Identification of studies via databases and registers.

Figure 2 .
Figure 2. Identification of studies via databases and registers.

Figure 4 .
Figure 4. Distribution of previous studies on different scopes of SCQM per database.

Figure 5 .
Figure 5. Distribution of researched sectors in the previous articles on different scopes of SCQM.

Figure 6 .
Figure 6.Number of previous studies on different scopes of SCQM published in different journals.

bility 2024 ,
16, x FOR PEER REVIEW 9 of 26 to enhance the precision and reliability of study results: (1) knowledge-based/directional and (2) data-based/quantitative.

Figure 7 .
Figure 7. Number of research methodologies utilized in previous articles on different scopes of SCQM.

Figure 7 .
Figure 7. Number of research methodologies utilized in previous articles on different scopes of SCQM.

Figure 8 .
Figure 8.The SCQM 4.0 conceptual framework of this study.Figure 8.The SCQM 4.0 conceptual framework of this study.

Figure 8 .
Figure 8.The SCQM 4.0 conceptual framework of this study.Figure 8.The SCQM 4.0 conceptual framework of this study.