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How does service quality predict loyalty? The serial mediation effects of perceived value and consumer brand identification 服务质量如何预测忠诚度?感知价值和消费者品牌认同的序列中介效应
Pub Date : 2024-07-26 DOI: 10.1108/ijqrm-12-2023-0385
Hasan Emin Gurler
PurposeProviding high-quality service for airline companies cannot be overstated, as it directly impacts their survival and competitiveness. Hence, there is an increasing need to measure loyalty in the air transport industry. Loyal customers are highly valued as they are less price-sensitive and require minimal communication efforts. Despite this, there is limited knowledge about the factors that influence a passenger’s level of loyalty towards an airline company. Therefore, understanding the precursors of loyalty is essential. This research investigates the serial mediation effect of consumer brand identification (CBI) and perceived value on the relationship between service quality and loyalty.Design/methodology/approachIn this research, quality is related to loyalty through value and CBI. A conclusive research design was adopted to determine whether value and CBI have a serial mediating effect on the quality-loyalty link. The research framework includes a three-path mediation model.FindingsBased on the analysis of 406 questionnaires, the study concludes that a serial mediation effect of CBI and perceived value on the quality-loyalty relationship exists. The research results indicate that CBI has a greater influence on improving customer loyalty than perceived value.Originality/valueThis study contributes to limited research on the serial mediating effect of value and CBI in the quality-loyalty relationship. It also provides empirical evidence on the determinants of loyalty as part of the Turkish aviation industry. This study highlights the significance of CBI as a critical factor for airlines to maintain their competitiveness in the market.
目的为航空公司提供优质服务,直接影响其生存和竞争力,这一点怎么强调都不为过。因此,航空运输业越来越需要对忠诚度进行衡量。忠诚度高的客户对价格的敏感度较低,需要的沟通工作也最少,因此备受重视。尽管如此,人们对影响乘客对航空公司忠诚度的因素了解有限。因此,了解忠诚度的前兆至关重要。本研究探讨了消费者品牌认同(CBI)和感知价值对服务质量和忠诚度之间关系的串联中介效应。本研究采用结论式研究设计,以确定价值和 CBI 是否对质量与忠诚度之间的联系具有串联中介效应。研究框架包括一个三路径中介模型。研究结果基于对 406 份问卷的分析,研究得出结论,认为 CBI 和感知价值对质量-忠诚关系存在序列中介效应。研究结果表明,与感知价值相比,CBI 对提高客户忠诚度的影响更大。它还提供了土耳其航空业忠诚度决定因素的经验证据。本研究强调了 CBI 作为航空公司保持市场竞争力的关键因素的重要性。
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引用次数: 0
Analysis of barriers for adopting blockchain in agri-food supply chain management: a decision support framework 在农业食品供应链管理中采用区块链的障碍分析:决策支持框架
Pub Date : 2024-07-25 DOI: 10.1108/ijqrm-03-2023-0078
Naveen Virmani, Rajesh Kumar Singh
PurposeIntegrating digital technologies such as artificial intelligence and blockchain make the agri-food supply chain (ASCM) transparent, resilient and flexible. However, its adoption is quite complex due to various anticipated barriers. So, the presented research purposes to explore and investigate the barriers.Design/methodology/approachThis study employs hybrid approach including Best-Worst Method (BWM) and Graph Theoretic Approach (GTA). Data were collected from industry experts employed in the agri-food sector and analyzed by means of standard operating procedures.FindingsGTA results show that Technological barriers have the highest barrier intensity. Moreover, BWM results show that “Increased operational complexity” is the topmost barrier to adopting blockchain in ASCM. “Lack of interoperability” ranks second among the identified barriers.Research limitations/implicationsThe results benefit the managers, practitioners and researchers to understand the anticipated barriers so that necessary strategies can be developed, and organizations can become more resilient, agile, transparent and traceable.Originality/valueThe presented work is the first to develop a mathematical model and assess the industry’s eagerness to adopt blockchain in ASCM. The proposed framework will greatly benefit the stakeholders working in agri-food sector.
目的整合人工智能和区块链等数字技术,使农业食品供应链(ASCM)变得透明、有弹性和灵活。然而,由于各种预期障碍,其采用相当复杂。因此,本研究旨在探索和调查这些障碍。本研究采用了混合方法,包括最佳-最差法(BWM)和图论法(GTA)。研究结果GTA 结果显示,技术壁垒的障碍强度最高。此外,BWM 结果表明,"操作复杂性增加 "是在 ASCM 中采用区块链的最大障碍。"研究局限性/影响研究结果有利于管理者、从业人员和研究人员了解预期障碍,从而制定必要的战略,使组织变得更加灵活、敏捷、透明和可追溯。所提出的框架将使农业食品行业的利益相关者受益匪浅。
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引用次数: 0
Unraveling the interplay between supply chain analytics and healthcare supply chain performance: establishing an underlying mechanism and a boundary condition 揭示供应链分析与医疗保健供应链绩效之间的相互作用:建立内在机制和边界条件
Pub Date : 2024-07-19 DOI: 10.1108/ijqrm-12-2023-0400
Francis Kamewor Tetteh, Dennis Kwatia Amoako, Andrews Kyeremeh, Gabriel Atiki, Francisca Delali Degbe, Prince Elton Dion Nyame
Purpose The coronavirus disease 2019 (COVID-19) pandemic represents one of the most significant disruptions to supply chains (SCs), stimulating both practitioners and scholars to seek ways to enhance supply chain performance (SCP). Recent advancements in technology, particularly supply chain analytics (SCA) technologies, offer promising avenues for mitigating risks associated with SC disruptions like those posed by the COVID-19 pandemic. However, the existing literature lacks a comprehensive analysis of the connection between SCA and healthcare SC (HSC) performance. To address this research gap, we employed the dynamic capability perspective to investigate the mediating roles of supply chain innovation (SCI), resilience (SCR) and flexibility (SCF) in the relationship between SCA and HSC performance. The study further examined the moderating role of a data-driven culture (DDC).Design/methodology/approach The proposed model was tested using survey data from 374 managers of healthcare facilities in Ghana. SPSS and Amos were used to analyze the data gathered.Findings The results showed that while SCA may drive HSC performance, the presence of SCI, SCR and SCF may serve as channels to drive enhanced HSC performance. Additionally, we also found that different levels of a DDC induce varying effects of SCA on SCI, SCR and SCF.Research limitations/implications The study’s results have theoretical and practical implications, offering valuable insights for the advancement of SCA in healthcare literature. They also deepen SC managers’ comprehension of how and when SCA can boost HSC performance. However, as the study was limited to healthcare facilities in Ghana, its findings may not be universally applicable.Originality/value This study contributes to the literature by demonstrating that SCI, SCR, SCF and a DDC could serve as transformative mechanisms to reap superior HSC outcomes. This study also offers contemporary guidance to managers regarding SCA investment decisions.
目的 2019 年冠状病毒病(COVID-19)大流行是对供应链(SC)造成的最严重破坏之一,促使从业人员和学者寻求提高供应链绩效(SCP)的方法。最近的技术进步,特别是供应链分析(SCA)技术,为降低与供应链中断相关的风险(如 COVID-19 大流行带来的风险)提供了前景广阔的途径。然而,现有文献缺乏对 SCA 与医疗保健 SC(HSC)绩效之间联系的全面分析。为了弥补这一研究空白,我们采用动态能力视角研究了供应链创新(SCI)、弹性(SCR)和灵活性(SCF)在 SCA 与 HSC 绩效之间关系中的中介作用。该研究还进一步考察了数据驱动文化(DDC)的调节作用。 设计/方法/途径 利用对加纳 374 名医疗机构管理人员的调查数据,对提出的模型进行了检验。结果 结果表明,虽然 SCA 可能会推动 HSC 业绩,但 SCI、SCR 和 SCF 的存在可能会成为推动提高 HSC 业绩的渠道。此外,我们还发现,DDC 的不同水平会导致 SCA 对 SCI、SCR 和 SCF 产生不同的影响。研究局限/启示 研究结果具有理论和实践意义,为医疗文献中 SCA 的发展提供了宝贵的见解。这些结果还加深了 SC 管理者对 SCA 如何以及何时能够提高 HSC 业绩的理解。原创性/价值 本研究通过证明 SCI、SCR、SCF 和 DDC 可以作为获得卓越的造血干细胞成果的变革机制,为相关文献做出了贡献。本研究还为管理者做出 SCA 投资决策提供了现代指导。
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引用次数: 0
The mediation role of innovation in the relationship between total quality management and performance of small and medium scale enterprises 创新在全面质量管理与中小型企业绩效关系中的中介作用
Pub Date : 2024-07-18 DOI: 10.1108/ijqrm-12-2021-0427
Francis Kamewor Tetteh, Benjamin Nyantakyi, Kwame Owusu Kwateng, Hannah Vivian Osei
PurposeThis study examined the mediation-moderation role of innovation and market dynamism in the association between total quality management (TQM) practices and the performance of small and medium-scale enterprises' (SMEs') performance with empirical evidence from sub-Saharan Africa.Design/methodology/approachUsing a questionnaire, the research model developed was tested with responses from 203 owners and managers of SMEs in Ghana. The analyses were done using Statistical Package for the Social Sciences (SPSS) and Smart Partial Least Squares Structural Equation Modeling (PLS-SEM).FindingsThe innovation initiatives partially and fully mediated the relationship between TQM practices and the performance of SMEs. Also, the indirect effect of TQM practices of SMEs on performance through innovation initiatives was negatively moderated by market dynamism.Practical implicationsThe study contributes to the TQM literature by validating the indirect and direct relationship between TQM practices and performance in the context of SMEs in a developing region.Originality/valueThis paper presents a novel understanding of the relationship between TQM and SMEs in developing regions of the world. The paper serves as a guide for SME owners and managers to improve the performance of their organizations through TQM practices.
目的 本研究利用撒哈拉以南非洲地区的经验证据,考察了创新和市场活力在全面质量管理(TQM)实践与中小型企业(SMEs)绩效之间的中介调节作用。分析使用了社会科学统计软件包(SPSS)和智能偏最小二乘法结构方程模型(PLS-SEM)。研究结果创新举措部分和全部调解了全面质量管理实践与中小企业绩效之间的关系。此外,中小型企业的全面质量管理实践通过创新举措对绩效的间接影响受到市场活力的负面调节。原创性/价值本文对全面质量管理与世界发展中地区中小型企业之间的关系提出了新的理解。本文可作为中小企业所有者和管理者通过全面质量管理实践提高组织绩效的指南。
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引用次数: 0
Lean thinking and risk management in healthcare organizations: a systematic literature review and research agenda 医疗机构的精益思维和风险管理:系统文献综述和研究议程
Pub Date : 2024-07-01 DOI: 10.1108/ijqrm-06-2023-0210
Luis Mendes, Grazielle França
PurposeHealthcare organizations have been facing challenges due to high costs and low efficiency in health services. The growth of costs and losses caused by avoidable mistakes lead to the search for solutions, and Health Lean Management appears as a potential solution to help in solving service quality problems, as well as reducing risks. This study aims to analyse the state of the art in the literature centred on the Lean approach in the context of risk management in healthcare organizations, and to identify new research opportunities, highlighting possible lines of future research.Design/methodology/approachFollowing a systematic literature review approach, 51 papers were considered relevant for this research, and reviewed to explore the development of literature in this area.FindingsBased on the results, five main research streams were identified: (1) risk management oriented towards patient safety; (2) risk management oriented towards employee safety; (3) importance of attitudes and behaviours in risk reduction projects; (4) Lean tools used in healthcare risk management and (5) Integration of approaches. Moreover, several shortcomings were identified in literature.Originality/valueIdentified shortcomings represent significant opportunities for further research development.
目的医疗机构一直面临着医疗服务成本高、效率低的挑战。成本的增长和可避免错误造成的损失促使人们寻求解决方案,而医疗精益管理似乎是一种潜在的解决方案,有助于解决服务质量问题并降低风险。本研究旨在分析以医疗机构风险管理中的精益方法为中心的文献现状,并确定新的研究机会,强调未来可能的研究方向。设计/方法/途径按照系统的文献综述方法,51 篇论文被认为与本研究相关,并进行了审查,以探索该领域的文献发展:(1) 以患者安全为导向的风险管理;(2) 以员工安全为导向的风险管理;(3) 态度和行为在降低风险项目中的重要性;(4) 医疗风险管理中使用的精益工具;(5) 方法的整合。此外,在文献中还发现了一些不足之处。
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引用次数: 0
The impact of institutional logics on specifications quality: investigating the mediation effects of legitimacy and stewardship behaviour 制度逻辑对规范质量的影响:研究合法性和管理行为的中介效应
Pub Date : 2024-06-13 DOI: 10.1108/ijqrm-10-2023-0302
Nabiira Nantongo, Matthew Kalubanga, Joseph Ntayi, Bonny Bagenda, Beatrice Nyakeishiki
PurposeThis study aims to examine the relationship between institutional logics and specifications quality, and how this relationship is mediated by the legitimacy of the procurement process and stewardship behaviour.Design/methodology/approachThis study draws on insights from institutional logics theory, and legitimacy and stewardship behaviour literature. We conducted an extended literature review to gain a comprehensive understanding of “institutional logics” and their manifestations in organizational contexts, utilizing the 2000–2024 data collected from the EBSCO, Scopus and Web of Science databases, complemented with Google Scholar. We gather that institutional logics manifest in several forms, and that while some organizations may thrive on a single logic, in certain contexts institutional logics can manifest in combinations – “multiple logics or hybrids”. Based on this understanding, we developed testable research hypotheses, predicting the influences of institutional logics – professional logic, efficient service logic and delivery (market) logic, on legitimacy, stewardship behaviour and specifications quality. We then carried out an empirical study, adopting a quantitative cross-sectional survey design with a self-administered questionnaire to test the hypothesized relationships. The empirical data were obtained from 162 procuring and disposing entities in Uganda and analyzed using the partial least squares structural equation modelling technique.FindingsThe study findings reveal that institutional logics exert a strong positive effect on the legitimacy of the procurement process and on stewardship behaviour, which, in turn, both positively influence specifications quality.Research limitations/implicationsThe study findings have implications for theory and practice. The study findings provide useful insights that support the conceptual and theoretical development of institutional logics theory and applications in procurement literature. In addition, the study findings enhance procurement managers’ understanding of the mechanisms through which institutional logics can foster specifications quality. However, considering the fact that the study was conducted in a single country context, and focused on the public sector only, the findings of the study might not be generalizable globally.Originality/valueThis study contributes to established knowledge about quality management and procurement by examining the legitimacy of the procurement process and stewardship behaviour of those involved in procurement processes as mechanisms through which procuring entities are able to use institutional logics to enhance specifications quality. In addition, the study highlights areas for future research that may be explored to increase understanding of the value of institutional logics in ensuring specifications quality, and the link between specifications quality and the general performance of procuring entities.
目的 本研究旨在探讨制度逻辑与规格质量之间的关系,以及这种关系如何通过采购过程的合法性和管理行为来调节。我们利用从 EBSCO、Scopus 和 Web of Science 数据库收集到的 2000-2024 年数据,并辅以谷歌学术(Google Scholar),对文献进行了扩展回顾,以全面了解 "制度逻辑 "及其在组织环境中的表现形式。我们发现,制度逻辑有多种表现形式,虽然有些组织可能在单一逻辑的基础上发展壮大,但在某些情况下,制度逻辑可能以组合的形式表现出来,即 "多重逻辑或混合逻辑"。基于这一认识,我们提出了可检验的研究假设,预测机构逻辑--专业逻辑、高效服务逻辑和交付(市场)逻辑--对合法性、管理行为和规格质量的影响。然后,我们开展了一项实证研究,采用自填问卷的横截面定量调查设计来检验假设的关系。实证数据来自乌干达的 162 个采购和处置实体,并使用偏最小二乘法结构方程建模技术进行了分析。研究结果研究结果表明,制度逻辑对采购过程的合法性和管理行为产生了强烈的积极影响,而这反过来又对规格质量产生了积极影响。研究结果为制度逻辑理论的概念和理论发展以及在采购文献中的应用提供了有益的启示。此外,研究结果加深了采购管理人员对制度逻辑促进规格质量的机制的理解。不过,考虑到本研究是在单一国家背景下进行的,并且只侧重于公共部门,因此研究结果可能无法在全球范围内推广。 本研究通过研究采购过程的合法性和采购过程中相关人员的管理行为,将其作为采购实体能够利用制度逻辑提高规格质量的机制,从而为有关质量管理和采购的既有知识做出贡献。此外,本研究还强调了今后研究可探索的领域,以加深对机构逻辑在确保规格质量方面的价值以及规格质量与采购实体总体绩效之间联系的理解。
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引用次数: 0
Logical analysis of data in predictive failure detection and diagnosis 预测性故障检测和诊断中的数据逻辑分析
Pub Date : 2024-06-12 DOI: 10.1108/ijqrm-02-2024-0048
Zhixuan Shao, Mustafa Kumral
PurposeThis study aims to address the critical issue of machine breakdowns in industrial settings, which jeopardize operation economy, worker safety, productivity and environmental compliance. It explores the efficacy of a predictive maintenance program in mitigating these risks by proactively identifying and minimizing failures, thereby optimizing maintenance activities for higher efficiency.Design/methodology/approachThe article implements Logical Analysis of Data (LAD) as a predictive maintenance approach on an industrial machine maintenance dataset. The aim is to (1) detect failure presence and (2) determine specific failure modes. Data resampling is applied to address asymmetrical class distribution.FindingsLAD demonstrates its interpretability by extracting patterns facilitating the failure diagnosis. Results indicate that, in the first case study, LAD exhibits a high recall value for failure records within a balanced dataset. In the second case study involving smaller-scale datasets, enhancement across all evaluation metrics is observed when data is balanced and remains robust in the presence of imbalance, albeit with nuanced differences in between.Originality/valueThis research highlights the importance of transparency in predictive maintenance programs. The research shows the effectiveness of LAD in detecting failures and identifying specific failure modes from diagnostic sensor data. This maintenance strategy exhibits its distinction by offering explainable failure patterns for maintenance teams. The patterns facilitate the failure cause-effect analysis and serve as the core for failure prediction. Hence, this program has the potential to enhance machine reliability, availability and maintainability in industrial environments.
目的本研究旨在解决工业环境中机器故障这一关键问题,因为机器故障会危及运营经济性、工人安全、生产率和环境合规性。文章将数据逻辑分析(LAD)作为一种预测性维护方法应用于工业机器维护数据集。其目的是:(1) 检测故障是否存在;(2) 确定具体的故障模式。研究结果数据逻辑分析法通过提取有助于故障诊断的模式,证明了其可解释性。结果表明,在第一个案例研究中,LAD 对平衡数据集中的故障记录具有较高的召回值。在第二项涉及较小规模数据集的案例研究中,当数据平衡时,所有评估指标都有所提高,并且在存在不平衡的情况下仍然保持稳健,尽管两者之间存在细微差别。研究显示了 LAD 在检测故障和从诊断传感器数据中识别特定故障模式方面的有效性。这种维护策略为维护团队提供了可解释的故障模式,从而显示出其与众不同之处。这些模式有助于故障因果分析,是故障预测的核心。因此,该方案有望提高工业环境中机器的可靠性、可用性和可维护性。
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引用次数: 0
Leveraging Lean Six Sigma principles in an Indian tertiary care hospital: a case study 在印度一家三级医疗保健医院运用精益六西格玛原则:案例研究
Pub Date : 2024-06-12 DOI: 10.1108/ijqrm-01-2024-0025
P. R. Srijithesh, E. V. Gijo, Pritam Raja, S. Bhat, S. Mythirayee, A. Taallapalli, Girish B. Kulkarni, Jitendra Siani, H.R. Aravinda
PurposeWorkflow optimisation is crucial for establishing a viable acute stroke (AS) intervention programme in a large tertiary care centre. This study aims to utilise Lean Six Sigma (LSS) principles to enhance the hospital's workflow.Design/methodology/approachThe Action Research methodology was used to implement the project and develop the case study. The study took place in a large tertiary care academic hospital in India. The Define-Measure-Analyse-Improve-Control approach optimised the workflow within 6 months. Lean tools such as value stream mapping (VSM), waste audits and Gemba were utilised to identify issues involving various stakeholders in the workflow. Sigma-level calculations were used to compare baseline, improvement and sustainment status. Additionally, statistical techniques were effectively employed to draw meaningful inferences.FindingsLSS tools and techniques can be effectively utilised in large tertiary care hospitals to optimise workflow through a structured approach. Sigma ratings of the processes showed substantial improvement, resulting in a five-fold increase in clinical outcomes. Specifically, there was a 43% improvement in outcome for patients who underwent acute stroke revascularisation. However, certain sigma ratings deteriorated during the control and extended control (sustainment) phases. This indicates that ensuring the sustainability of quality control interventions in healthcare is challenging and requires continuous auditing.Research limitations/implicationsThe article presents a single case study deployed in a hospital in India. Thus, the generalisation of outcomes has a significant limitation. Also, the study encounters the challenge of not having a parallel control group, which is a common limitation in quality improvement studies in healthcare. Many studies in healthcare quality improvement, including this one, are limited by minimal data on long-term follow-up and the sustainability of achieved results.Originality/valueThis study pioneers the integration of LSS methodologies in a large Indian tertiary care hospital, specifically targeting AS intervention. It represents the first LSS case study applied in the stroke department of any hospital in India. Whilst most case studies discuss only the positive aspects, this article fills a critical gap by unearthing the challenges of applying LSS in a complex healthcare setting, offering insights into sustainable quality improvement and operational efficiency. This case study contributes to the theoretical understanding of LSS in healthcare. It showcases its real-world impact on patient outcomes and process optimisation.
目的优化工作流程对于在大型三级医疗中心建立可行的急性中风(AS)干预计划至关重要。本研究旨在利用精益六西格玛(LSS)原则来改进医院的工作流程。设计/方法/途径采用行动研究法来实施项目和开展案例研究。研究在印度一家大型三级医疗学术医院进行。定义-测量-分析-改进-控制 "方法在 6 个月内优化了工作流程。利用价值流图(VSM)、浪费审计和 Gemba 等精益工具,找出工作流程中涉及各利益相关方的问题。利用西格玛级计算来比较基线、改进和维持状态。此外,还有效利用了统计技术,以得出有意义的推论。研究结果LSS 工具和技术可有效用于大型三级医院,通过结构化方法优化工作流程。对流程的西格玛评分显示出显著改善,从而使临床结果提高了五倍。具体来说,接受急性中风血管重建术的患者的疗效提高了 43%。然而,在控制和扩展控制(持续)阶段,某些西格玛评级出现了恶化。这表明,确保医疗质量控制干预措施的可持续性具有挑战性,需要持续进行审核。因此,成果的推广具有很大的局限性。此外,该研究还遇到了没有平行对照组的挑战,这是医疗质量改进研究中常见的局限性。包括本研究在内的许多医疗质量改进研究都受到了长期随访数据极少以及所取得成果的可持续性的限制。它是印度任何一家医院中风科应用的首个 LSS 案例研究。大多数案例研究只讨论了积极的方面,而本文通过揭示在复杂的医疗环境中应用生命支持系统所面临的挑战,为可持续的质量改进和运营效率提供了见解,从而填补了这一重要空白。本案例研究有助于从理论上理解医疗保健领域的生命支持系统。它展示了 LSS 在现实世界中对患者治疗效果和流程优化的影响。
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引用次数: 0
The impact of the day of the week on the financial market: an empirical investigation on cryptocurrencies 星期对金融市场的影响:对加密货币的实证调查
Pub Date : 2024-06-03 DOI: 10.1108/ijqrm-03-2023-0092
S. Arzova, Ayben Koy, B. Sahin
PurposeThis study investigates the effect of the day of the week on the volatility of cryptocurrencies. Thus, we reveal investors' perceptions of the day of the week.Design/methodology/approachThe EGARCH model consists of the day of the week for 2019–2022 and the volatility of 11 cryptocurrencies.FindingsEmpirical results show that the weekend harms cryptocurrency volatility. Also, there was positive cryptocurrency volatility at the beginning of the week. Our findings show that weekdays and weekends significantly impact cryptocurrency volatility. Besides, cryptocurrency investors are sensitive to market movements, disclosures, and regulations during the week. Holiday mode and cognitive shortcuts may cause cryptocurrency traders to remain passive on weekends.Research limitations/implicationsThis study has some limitations. We include 11 cryptocurrencies in the analysis by limiting cryptocurrencies according to market capitalizations. Further studies may analyze a larger sample. In addition, further studies may examine the moderator and mediator effects of other financial instruments.Practical implicationsThe empirical results have research, social and practical conclusions from different aspects. Our analysis may contribute to determining trading strategies, risk management, market efficiency, regulatory oversight, and investment decisions in the cryptocurrency market.Originality/valueThe calendar effect in financial markets has extensive literature. However, cryptocurrencies' weekday and weekend effect needs to be adequately analyzed. Besides, studies analyzing cryptocurrency volatility are limited. We contribute to the literature by investigating the impact of days of the week on cryptocurrency volatility with a large sample and current data.
目的本研究调查了星期对加密货币波动性的影响。因此,我们揭示了投资者对星期几的看法。设计/方法/途径EGARCH模型由2019-2022年的星期几和11种加密货币的波动率组成。研究结果实证结果表明,周末会损害加密货币的波动性。此外,加密货币波动率在周初为正。我们的研究结果表明,工作日和周末对加密货币的波动性有重大影响。此外,加密货币投资者在一周内对市场动向、信息披露和法规非常敏感。假日模式和认知捷径可能会导致加密货币交易者在周末保持被动。我们将 11 种加密货币纳入分析范围,并根据市值对加密货币进行了限制。进一步的研究可能会分析更大的样本。实践意义实证结果从不同方面得出了研究、社会和实践结论。我们的分析可能有助于确定加密货币市场的交易策略、风险管理、市场效率、监管监督和投资决策。然而,加密货币的工作日和周末效应还需要充分分析。此外,分析加密货币波动性的研究也很有限。我们利用大样本和当前数据研究了一周内的天数对加密货币波动性的影响,为相关文献做出了贡献。
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引用次数: 0
Availability analysis of imperfect repairable system subject to inspection 对接受检查的不完善可修复系统进行可用性分析
Pub Date : 2024-06-03 DOI: 10.1108/ijqrm-10-2023-0335
Ritu Gupta, Sudeep Kumar
PurposeThis work examines a repairable machining system’s reliability by considering multiple failure scenarios, including individual component failures, hardware and software malfunctions, failures resulting from shared causes and failures caused by human error. When a system is susceptible to several modes of failure, the primary goal is to forecast availability and other reliability metrics as well as to calculate the expected profit of the repairable machining system.Design/methodology/approachThe process of recovering after a system failure involves inspecting the system and fixing any malfunctions that may have occurred. The repair procedures for all kinds of faults are taken to follow a general distribution to represent real-time circumstances. We develop a non-Markovian stochastic model representing different system states that reveal working, failed, degraded, repair and delayed repair states. Laplace transformation and the supplementary variable technique are used to assess the transient states of the system.FindingsAnalytical expressions for system performance indices such as availability, reliability and cost-benefit analysis are derived. The transient probabilities when the system experiences in different states such as failed, degraded and delayed states are computed. The results obtained are validated using Mathematica software by performing a numerical illustration on setting default values of unknown parameters. This ensures the accuracy and reliability indices of the analytical predictions.Originality/valueBy methodically examining the system in its several states, we will be able to spot possible problems and offer efficient fixes for recovery. The system administrators would check to see if a minor or major repair is needed, or if a replacement is occasionally taken into consideration to prevent recurring repairs.
目的 通过考虑多种故障情况,包括单个组件故障、硬件和软件故障、共同原因导致的故障以及人为失误导致的故障,本研究对可修复加工系统的可靠性进行了研究。当系统易受多种故障模式影响时,主要目标是预测可用性和其他可靠性指标,以及计算可修复加工系统的预期利润。设计/方法/途径系统故障后的恢复过程包括检查系统和修复可能发生的故障。各种故障的修复过程都遵循一般分布,以代表实时情况。我们建立了一个非马尔可夫随机模型,代表不同的系统状态,包括工作状态、故障状态、退化状态、修复状态和延迟修复状态。研究结果得出了可用性、可靠性和成本效益分析等系统性能指标的分析表达式。计算了系统处于故障、降级和延迟等不同状态时的瞬态概率。通过设置未知参数的默认值,使用 Mathematica 软件进行数值说明,对所获得的结果进行验证。原创性/价值通过有条不紊地检查系统的几种状态,我们将能够发现可能存在的问题,并提供有效的修复恢复方法。系统管理员将检查是否需要进行小修或大修,或者是否偶尔考虑进行更换,以防止重复维修。
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International Journal of Quality & Reliability Management
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